apply_to_feature_matrix method fixed in PCA
PCA unit test added
PCA code changes fixed
PCA in-place
updating revision of data submodule
data submodule update
data state updated after merge
PCA unittest added/PCA code minor changes
PCA unit-test divided into small parts
added PCA in-place as well as reallocate
PCA init fixed
SG_ADD corrected for mem_mode
Merge pull request #1874 from mazumdarparijat/pca

PCA bug fixed