added exercise 7. A bit late, but what ever.
added the untouched ex6
finished excersize 4.
fixed NN feedforward algo. X was not correctly transposed.
finished ex3 :)
added machine learning excersize 2
Merge branch 'master' of github.com:kamu/ocw-assignments
start listing the courses in the readme
fixed the crap cost function.
initial commit, added machine learning online course assignment 1