4aab45 - introduce %%{dynload_dir} macro

Authored and Committed by dmalcolm 9 years ago
    - introduce %%{dynload_dir} macro
    - explicitly list all lib-dynload files, rather than dynamically gathering
        the payload into a temporary text file, so that we can be sure what we
        are shipping
    - introduce a macros.pybytecompile source file, to help with packaging
        python3 modules (Source3; written by Toshio)
    - rename "2to3-3" to "python3-2to3" to better reflect python 3 module
        packaging plans
    
        
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