KNN not sure about accuracy
KNN

New version using hamming to calculate distances, and 10-fold cross
validation
KNN
KNN_main and proj04 updated

Knn alterado e agora está testando exemplos de cada classe
separadamente, com valores de K variados.
Removed non-KNN statements from the main script
Merge branch 'knn'

Conflicts:
	proj04.m