Fixed various issues, including prototype error on load. Closes #9.

- Updated the README to reflect changes to Google Developers Console UI.
- Removed references to App ID from README, since it wasn't being used.
- Removed `apiKey` from app config, since it wasn't being used.
- Moved monkey patching of text field into the initializer and onLoad handler, since the [class is no longer public](http://stackoverflow.com/questions/26664460).
- Fixed app ID extraction to handle new format.
- Removed dependency on `grunt-bower-hooks`, since it's no longer hosted on NPM and doesn't appear to be used.