Replace ngmin with ngAnnotate.

@prabinv @texasag @kevinsproles @tsanko
Swap out ngmin (depricated) for ng-annotate and much faster build times.

Whomever merges this please send out communication to the team. They will need to run the following on Master and either make new branches from master or rebase feature-branches in progress:

- npm install 
- npm uninstall grunt-ngmnin 
    - (should not need --save-dev here since I already commited that change)