Issue #264: Fixes for windows paths

This PR gets mojito up and running on Windows (tested on Windows 7 with Node 0.8.6). I tested against the "newsboxes" example app and all seems to be working.

Known issues:
- Unit tests need to be fixed so that they pass on a Windows box, although they still pass on our dev and build boxes
- `mojito jslint`'s exclusion matcher uses regular expressions that contain "/". It may be better to use glob to get a list of exclusions instead.
- Other command line tools haven't been tested

I'm sure there's more, but this should at least get the ball rolling for anyone out there that is interested in Windows support.