EM base class added
mixture model class structure
Merge pull request #2446 from mazumdarparijat/em

EM base class added
Merge pull request #2442 from mazumdarparijat/kdensity

class structure for mixture model added
updated data to merge of ANPR notebook data
ANPR notebook added
tweaked findcontours
addded a try catch for import cv2
Merge pull request #2384 from kislayabhi/anpr

ANPR notebook added