Gussie it up

* Adds a cfpbstyle example app (along with entry in the README) to allow for custom styling
* Use cfpb.github.io styles (and markup) to add a header (when cfpbstyle app is enabled)
* Remove reset-view button
* Use Toner-lite for the tile layer
* Fix some errors in color calculation
Umm, what's this website we're linking to?