Added docstring to inner undoable wrapper
Removed keyword args from undoable decorator and added a warning
Moved around _attempt and _any for code clarity
Fixed multiple typos
Added a license text and tox setup to test style with pylint and flake8
Moved standard tox test env to py27
Multiple style fixes and some typos fixed
Renamed all Terminal methods that had the prefix 'parser' to 'terminal'
Fix typo of Integer in parser