compress app to `deploy` directory.
Merge branch 'uglify' of github.com:codepogo/shipscope into uglify
uglified shipscope:

* created two uglified files: `shipscope.min.js` and `shipscope-background.min.js`
* updated `popup.html` and `background.html` to use the uglified files.
* added a clean task and updated the `build` task with `clean` and `uglify`.
* updated the `karma` task with `clean` and `uglify`.