Removed all external dependencies -- minus the mapbox tiles

- used bower to pull in most javascript files
Tweaked heatmap display settings
Merge branch 'develop' into feature-markerClusters
- merged changes to not rely on external files

Conflicts:
	bower.json
	html/index.html
Added webfonts for open sans
Merge branch 'develop' into feature-markerClusters
Added web workers to chunck out the way clusters are loaded

- Not sure if this is the best way to do it. This is my first exposure
  to web workers