Spec clean-up
    
    - Specify all dependencies
    - Drop support for legacy distributions prior to Fedora 14
    - Drop legacy Group: tag
    - Drop %defattr, redundant since rpm 4.4
    - Drop buildroot cleaning in %install section
    - Don't need to remove empty directories from the buildroot
    - Simplify find commands using -delete
    - Simplify %files list
    - Drop redundant "automake" patch
    - Fix building on Perls without "." in @INC