Rather than trying to keep injection annotations up-to-date manually, we
can use the computer to do it for us.

[browserify-ngannotate][1] is a browserify transform plugin that uses
[ng-annotate][2] to automatically generate injection annotations for the
Angular injector.

[1]: https://github.com/omsmith/browserify-ngannotate
[2]: https://github.com/olov/ng-annotate