Overhaul of UI to bring inline with other Oil Change assets.
Firefox improvements.
add ability to set pre and post event functions, in order to avoid messy overrides
make stylesheet path relative
add some dummy post_event functions. Center tooltips. get rid of list declaration
some additional example functionality
Responsive navbar.
Merge branch 'ui' of github.com:michalgm/state_dem into ui
Added D3 graphs from dummy data in Infocards.
point to styrotopia backend for easier UI development
Merging UI branch