Extracted list of gathering kinds into a model
Added a CSS class to event container based on the gathering kind
Display gathering kind SVG icons
Added a test for the pending inclusion of a PNG as SVG fallback
Added PNG fallback for SVG icons
Added an "About" page with the licensing information for the icons
Merge branch 'gatheringkinds' of github.com:xavier/brug into xavier-gatheringkinds

Conflicts:
	config/routes.rb