DOC List happy as dependency

Add instructions for installing happy on Ubuntu.
Merge pull request #6 from luispedro/master

DOC List happy as dependency
Merge pull request #17 from aavogt/master

a bunch of changes
Fixing IHaskell path resolution for 'IHaskell setup'.
Finished a comment.
Adding more general configuration mechanism.
Change b'' to just ''.
Syntax errors no longer break file IO and everything.
Renamed to not have spaced.
Check for IPython version.
make note of the fact that you need ipython 1.0 or higher
fix #21 by ignoring stuff after each valid int
add doctest runner