Update repo URLs
Add license text
Require Node.js >= 0.8
Fix path.existsSync deprecation warning
Declare peerDependency on grunt ~0.4.0
Update README

Merged with the template created by `grunt-init gruntplugin`.
Use Grunt to run jshint

Will hopefully have tests to run with Grunt in the future
Fix jshint warnings
Remove useless comment
Use when ~2.0.0