WIP: Version 2.0

An updated version of 2nd City Zoning! Staging site at: http://new.secondcityzoning.org/

* updated zoning map (Oct 2014)
* using CartoDB instead of Fusion Tables (no more disappearing polygons, better interactions, deep linking to selected areas)
* more detailed color scheme indicating density
* dropped Ruby/Sinatra and ported to Jekyll
* deep links to PMD and PD development plans

Todo:
* [ ] add additional tile layers (satellite, OSM)
* [ ] disable sound effects by default, add toggle option
* [ ] address autocomplete (Google places)