PCA bug partially solved
MKL nb
minor fixes
zero tolerance added for whitening in PCA
add fixes
added unit test for null spectrum approximation in quadratic time mmd and a minor spell correction
Merge pull request #2071 from mazumdarparijat/pca

PCA bug partially solved
multiclass example
Merge pull request #2087 from lambday/develop

added unit test for null spectrum approximation in quadratic time mmd and a minor spell correction
Made CLinearOperator generic
Refactor MulticlassMultipleOutputLabels
Added back the commented code.
Removed old enumerator
Fixed whitespaces and Documentation
cleanup
Merge pull request #2088 from Jiaolong/refactor_MulticlassMultipleOutputLabels

Remove MulticlassMultipleOutputLabels
Renamed apply_multiclass_multiple_output to apply_multilabel_output
Renamed python example classifier_multiclassmultipleoutputlinlinear_modular.py
Decision Tree Notebook started
one-class example