Merge pull request #4 from vasnake/ex3

ex3 from vasnake
Neural network tests
Merge branch 'master' of github.com:cod3monk3y/coursera-ml005-unittests

Conflicts:
	ex3/test_ex3.m
Neural Network boolean tests
added: test for predictOneVsAll
commented out: unstable oneVsAll test; non-standard predict tests