Minification and JSHint by Grunt, bumped file version and some minor changes!

I really like the plugin idea so I decided to contribute a bit!

Added Grunt to Minify and JSHint on grunt compile, this will generate a ngProgress.min.js file ready for production use, you can install all of the modules by doing npm install after cloning, the original file now resides on the folder src.

Some file versions were missing a bump so I added that also.

And there was a reference to $body not being used when appending the styles to the body.


Let me know if you want something changed or done other way, this closes #2.

Cheers.