Empty problem files
Added some functional programming examples
Minor edit
Merge branch 'probs'

Adding the Euler problems we would like to talk about.
Added matching example
Made the inorder functionality a bit more general
Added matching test cases
Added example parser combinators
Simple parser combinator for the WHILE language
Fancier WHILE language (still need to add AND/OR operators)
Added more stuff to the WHILE example
Adding evaluation to the WHILE parser (in-progress)
Fixed bug (missing minus/divide operations)
Added GEQ/LEQ comparisons
Moved some things around
Forgot to add moved test file
Merge remote-tracking branch 'upstream/master'