GPII-88 Initial Windows Grunt Build

Initial work for GPII-88 on Windows.
http://issues.gpii.net/browse/GPII-88
I've reverted the changes with respect to the file renames and variable skips.  Also, I've updated the README with grunt isntructions includign the --ignore-scripts as part of those.

Do note, that until the corresponding universal pull request is merged that inside of package.json the grunt-gpii dependency must read as:

grunt-gpii": "git://github.com/sgithens/grunt-gpii.git"