mixture model training added; EM for mixture model added
memory errors fixed
rename GPC
minor changes in mixture models
Merge pull request #2448 from mazumdarparijat/em

mixture model training added; EM for mixture model added
Merge pull request #2477 from yorkerlin/develop

rename the GPC modular
python interface for FisherLDA
fisherfaces example added
fisherfaces python_interface example added
added integration data files