Fixed compeletePath tests.
Removed filemanip dependency.
Removed imports for filemanip package. No longer necessary, using haskeline instead.
Added general path completion using haskeline.
Added MonadIO (from transformers package) instance for Interpreter.
Cleanup whitespace.
Merge remote-tracking branch 'upstream/master' into path_completion

Conflicts:
	IHaskell.cabal
	src/IHaskell/Eval/Completion.hs
Merge pull request #103 from edechter/path_completion

Path completion