refactor repo + add words filter

Hi :)

Thanks for initiating this module; I added grunt support to the repo and a new 'words' filter and removed node_modules and various stuff.

Just run `npm install` to install dependencies
Then :
 - `grunt test-server` to run tests in Chrome+FF
 - `grunt build` to build prod versions in dist folder
 - `grunt webserver` to run a webserver on port 9999 (for the demo)

Hope this helps