1.04: 2000/6/17, add "load" button to svm-toy. README 

file updated.

2.0: 2000/8, major updates. Include nu-svm, one-class svm, and svr

2.01: 2000/9/22, correct the calculation of obj value and number of bounded support vectors

2.02: 2000/9/29, replace b^2/2 newsvm to regular nu svm.

2.03: 2000/10/24 some improvements on the computational speed

2.1: 2000/12/19 Java version included, regression demonstrated in svm-toy

2.2: 2001/1/16 multi-class classification, nu-SVR, remove epsilon_a

2.3: 2001/3/15 c+-, cross validation, fix some minor bugs

2.31: 2001/4/12 fix one bug on one-class SVM, use float for Cache

2.32: 2001/9/23 

	1. max line number of svm-scale now dynamic

	2. gcc 3.0 problem: now g++ always used

	3. java code in a "libsvm" package

	4. avoid a problem when compiled with Borland C++ builder

2.33: 2001/12/1

	Python interface added

2.34: 2002/6/15

	Add the subroutine svm_check_parameter in svm.cpp

	--> better error handling

	fix bug of python interface for handling different weights

	fix bug of cross validation in svm-train.c

2.35: 2002/6/16

	libsvm.jar was not compiled correctly in 2.34

2.36: 2002/8/4

	grid.py added: contour plot of CV accuracy

	fix several bugs

2.4:  2003/4/1

	svm.cpp

		non-psd kernel using max(...,0) in svm.cpp

	python interface

		python interface bug (nu-svm)

	grid.py

		-log2c and -log2c for grid.py

	        output current best

		coarse grid as default (2)

		ssh for grid.py 

	improvements of scaling 

2.5: 2003/11/13

	subroutines for accessing decision values and number of labels. 

		for svm.cpp, java, and  python interface

	fix bug of svm-scale.c (about -r and -s factors)

	use fscanf but not sscanf in svm-predict.c (faster)

	makefile for windows

	add "using namespace std;" in some .java files

	improve easy.py: output cv rate, error messages printed

		better checking

	better python interface example svm_test.py

	and some minor updates

2.6: 2004/04/01

	Probability estimates for classification/regression 

	Python interface: use swig 1.3 instead of 1.1

	Cross validation becomes a library subroutine

	A few minor corrections: (not completely listed)

		more interface functions such as getting svm_type

		print nu only when Cp=Cn

		floor division in python interface

2.7: 2004/11/10

	Stratified cross validation

	Better faq

	Scaling: support storing the factor of y

	A few minor updates:

		class QMatrix added

		improve the use of easy.py and grid.py on windows 

		grid.py: same CV and same g: use smaller C

		sparse input for python interface

		working set selection: < to <=

2.71: 2004/11/20

	fix a java bug introduced from 2.6 to 2.7

2.8: 2005/04/01

	new working set selection via second order information

	fix minor changes/corrections:

		problem when cache size less than two kernel columns

		-v #data -> stratified CV is not loo -> ensure loo is done

		problem of typing "svm-train -c" only

		problem of "svm-train -n 1 -s 3 ..."

		python interface makefile: -fPIC for 32/64bit

		color change in svmtoy

		makefile in building QT svmtoy

2.81: 2005/11/20

	add a python script subset.py for subsampling

	slightly modify the working set so it's exact the same as the paper

	default cache size to 100 MB

2.82: 2006/04/01

	precomputed kernel

	directly implement a fast powi() function

	poly degree double to int

	minor corrections:

		java code for CV

2.83: 2006/11/17

	Fix the bug of -t 3

	better checking load/save in svm-train.c/svm-predict.c/svm.cpp

	remove redundant var pos in svm_predict_values (thanks to Albert Strasheim)

	Better descriptions in README for the precomputed kernel

2.84: 2007/04/01

	Improve the shrinking code: faster for some cases

	Code more 64-bit friendly: allow large -m

	In Solver, b is replaced by p

	Subroutine max_violating_pair removed. Things are directly

	written in do_shrinking().

	Modify do_shrinking() so variable names are the same as libsvm

	document

2.85: 2007/11/6

	fix minor memory leak in svm-predict.c

	add tools/checkdata.py 

	java to 1.5

	Makefile: CXX?

	Makefile.win: avoid warning from .net 2005

	avoid warning of gcc 4.2

	sigma 0.001 to 1e-12; in Newton direction of prob output

	2 * (long int) l avoid warning of old Visual C++

	grid.py: avoid gnuplot problem on windows

2.86: 2008/04/01

	svm-scale for java

	version number in svm.h and svm.m4

	rename svmtrain.exe to svm-train.exe 

	python: while 1 --> while True, Popen -> call

	show best parameters on the contour of grid.py

2.87: 2008/10/13

	svm-toy/qt updated to qt4 from qt3

	fix a bug in svm-scale.c

		max feature index of -r file is considered

	Makefile: add make lib; add -Wconversion and -fPIC in Makefile

	Add "rb" in load_model of svm.cpp

	Simplify do_shrinking of svm.cpp

	Change the order of loops in reconstrict_gradient of svm.cpp

		save the number of kernel evaluations

	Add python/setup.py

2.88: 2008/10/30

	better gradient reconstructions

	issue a warning	when -h 0 may be faster

2.89: 2009/04/01

	reduce input/loading time of svm-train/svm-predict by half

	pointer function so users can specify their own outputs

	remove info_flush() 

	a extern variable libsvm_version

	svm-train -q option (disable outputs)

	svm-scale: warning if more nonzero produced

	easy.py: popel.communiate() to avoid some deadlock (if lots of

		outputs when #classes is large)

2.9: 2009/11/1

	tools/*.py can be run under python 3.0

	svm_set_quiet() in python interface to disable outputs

	check gamma < 0

	internal functions to be static

2.91: 2010/04/01

	completely new python interface using ctype

	new way to set the print_string function

	Java: able to load model from a BufferedReader directly

	fix grid.py so -log2c can be run under python 2.6 or after

3.0: 2010/09/13

	Move model structure to svm.h

	Two functions for freeing a model (content or the whole model)

	QD from Qfloat to double (better precision because SSE on 64-bit machines less accurate than i387 on 32-bit

	exit status for checkdata.py 

	old python interface (swig) is removed

3.1: 2011/04/01

	MATLAB interface:

		Merge matlab interface to core libsvm

		Using mexPrintf() when calling info() in MATLAB interface.

		Both 32- and 64-bit windows binary files are provided

	Java:

		Math.random is replaced by Random in java interface

	Python interface:

i		subroutines to get SVs 

		relative path to load *.dll and *.so

	svm.cpp: 

		null pointer check before release memory in svm_free_model_content()

		svm_destroy_model() no longer supported.

	svm-train.c and svm-predict.c

		Better format check in reading data labels

	svm-toy:

		fix the svm_toy dialog path

	tools:

		Using new string formatting/encoding in tools/*.py

		clearer png output, fix grid.py legend

3.11: 2011/11/5

	Set max number of iterations in the main loop of solvers

	matlab:

		new make.m for unix/mac/windows and for matlab/octave

	matlab and python:

		fix a problem that decision values returned by svmpredict is empty if number of classes = 1

3.12: 2012/04/01

      svm-toy: support loading/saving of regression data

      python interface: handle the issue of the "0th" feature if using lists

      tools/grid.py: not redrawing contour if c,g, cv doesn't change

      add setlocale when saving and loading model so not affected by users' locale

3.13: 2012/11/06

      svm.c and svm.h:

            add sv_indices in model structure, so users can know which training instances are SVs

	    two library funs svm_get_sv_indices and svm_get_nr_sv are added

	    max_iter warning moved to stderr so -q won't disable it

      svm-train.c:

            usage modified to stress that multiclass is supported

      svm-predict.c:

            add -q for svm-predict

      svm-scale.c:

	    issue a warning if feature indices do not start from 1

	    issue a warning for inconsistency between scaling-factor file and input file

      tools:

	    subset.py is written to be much faster

3.14: 2012/11/16

      fix a bug: we didn't re-compile windows binary after updating svm.def

3.15: 2013/1/27

      fix the bug of not freeing sv_indices

      tools/grid.py:

             -null option: allow the search on C or g only

	     -resume option: resume tasks from an earlier run

	     can be called as a python module            	

      python interface:

      	     local package searched first

	     libsvm options can be str or list

	     param.show() becomes print(param)

3.16: 2013/1/27

      tools/:

             easy.py fails in 3.15. Fix it by modifying grid.py

3.17: 2013/04/01

      svm.cpp:

	     if class labels are 1 and -1, ensure labels[0] = 1 and labels[1] = -1

      	     initialize model->sv_indices as null in svm_load_model

	     if nr_fold > # data, change nr_fold to be # data and ro leave-one-out cv 

      matlab interface: 

      	     handle the problem where output variables are not specified

3.18: 2014/04/01

      svm.cpp and svm-scale.c:

      	     check return values of fscanf

      matlab interface:

      	     Makefile no longer handles octave because make.m should be used

3.19: 2014/10/27

      svm.cpp:

             use size_t rather than long int in some places for 64-bit windows support

      matlab interface:

             use size_t and mwIndex to avoid type conversions

      python interface:

             use __all__

3.20: 2014/11/15

      matlab interface:

             fix a bug in libsvmwrite.c introduced in 3.19 (cannot run on windows)

3.21: 2015/12/14

      pre-built windows exe files changed from 32 to 64 bit

      matlab interface:

             now use #include "../svm.h"

             fix some minor issues in make.m of matlab interface