Fixes bunch of stuff.

Added Grunt tasks.
  - **test**. All tests are now executed with `grunt test`. Removed `test/run-tests.sh`. Cleaned up `test/karma.conf.js`.
  - **build**. Builds a minified version of the module to `dist/angular-slugify.min.js`, with a commented banner containing the contents of the file `COPYING` (license).
  - **jshint**. Checks the javascriptz. Ja.

Fixes paulsmith/angular-slugify#11.
Fixes paulsmith/angular-slugify#9.
Fixes paulsmith/angular-slugify#8.
Fixes paulsmith/angular-slugify#7.