Update Controller.js for use with LayerControl widget.
created CONTRIBUTING.md and COMMITTERS.md to help contributors and
future prospective committers.
revised README.md.
Correct link to CONTRIBUTORS.md (not COMMITTERS.md)
Correct link to CONTRIBUTING.md.
remove the obsolete `GeoLocation` widget.
Add LayerControl widget.
Replace TOC widget with LayerControl widget in config.
Cleanup unused vars in some of the dijits.
more cleanup of unused vars in dijits.
remove console.log statement.
Merge branch 'develop' into feature/MapClickMode-by-topic

Conflicts:
	viewer/js/gis/dijit/Draw.js
	viewer/js/gis/dijit/FloatingTitlePane.js
	viewer/js/gis/dijit/Growler.js
	viewer/js/gis/dijit/Print.js
	viewer/js/viewer/Controller.js

Used my copy for each of the files in conflict.
Will merge those manually.
Only significant diff is in Controller.