* Added few classifiers to demos/classifier.py; demos/classifier_test_train.py - for test train accuracy estimation; demos/classifier_webcam.py for webcam face recognition
* Two stage classifier in webcam demo
* Renamed classifier_test_train; cleaned up demos/classifier_webcam.py
* Initial commit of working unknown evaluation. Clean up pending
* Clean up lfw-classification-unknown.py and fix flake8 warnings
Vijayenthiran Subramaniam