Refactor of login area and added Bower for client packages 

- This adds Bower for client packages for issue #1798 and removes the submodules for globalize, underscore, and nvd3. This issue does *not* remove the symlinks or modify the enyo dependencies.
- This also adds Bootstrap to the login area so that more content can be added to the grid for free-trial
- This does *not* complete #1584, which will require an upgrade to font-awesome before the Bower module can be used.