Support for community district display.
GitHub Issue: https://github.com/chriswhong/taxMap/issues/15

Changed:
Added geojson file with community district shapes. scripts/community.json
Added model / route / controller for communityDistricts
frontpage loads on root instead of /geo
Support for community district display.
GitHub Issue: https://github.com/chriswhong/taxMap/issues/15

Changed:
Updates to taxmap.js to support different geometries:
    separate hover for districts and tax lots
    separate click events for districts and tax lots
minor changes in taxmap.js to ease use of adding and removing of tax lot info boxes.
some code clean up.
update bootstrap
Merge branch 'master' into community-districts

Conflicts:
	app/controllers/index.js
	app/routes/index.js
	app/views/leaflet.html
	public/js/taxmap.js