fix install_cffi for other than python 2.7

git-svn-id: svn+ssh://svn.code.sf.net/p/kaldi/code/sandbox/oplatek/@2544 5e6a8d80-dfce-4ca6-a32a-6e07a63d50c8
Fix another try

git-svn-id: svn+ssh://svn.code.sf.net/p/kaldi/code/sandbox/oplatek/@2545 5e6a8d80-dfce-4ca6-a32a-6e07a63d50c8
[Ondra branch]: Fix to cblas-wrappers.h, broken in recent revision

git-svn-id: svn+ssh://svn.code.sf.net/p/kaldi/code/sandbox/oplatek/@2547 5e6a8d80-dfce-4ca6-a32a-6e07a63d50c8
Added ffi check

git-svn-id: svn+ssh://svn.code.sf.net/p/kaldi/code/sandbox/oplatek/@2549 5e6a8d80-dfce-4ca6-a32a-6e07a63d50c8
Refactored python-decoding plus gitignore fixes