Initial widget setup and base code

- Updated gulp file "source" task to explicitly only use settings.html and widget.html
- Adding separate JS files for analytics, main, and spreadsheet
- Updated widget.html
	- import normalize.css for a css reset
	- importing jsapi, widget-common code for visualization, jquery.dataTables, and all widget JS
- bower.json updated to include dependencies on normalize-css, rise visions jquery data tables, and widget-common
Merge pull request #34 from stulees/master

Initial widget setup and base code