docs(app): make tests pass

Due to the recent changes ragarding the Docs app "Materialization", some
tests where failing for the following reasons:

1. JQuery wasn't being copied to 'build/docs/components/'.
2. E2E examples 89 and 90 were relying on the Bootstrap's glyphicons.
   Temporarily replaced with FontAwesome icons; to be replaced with
   Material Design iconfont, when ready.
3. `ngMaterial` (and its various dependencies) weren't loaded by Karma
during unit testing (causing modules depending on it to fail). Added a
fake `ngMaterial` module (as a temporary solution).