article view
updated grunt file to support subdirectories, deleted unused views & controllers, finished costshare view with fix data, started costshare/:id view with fix data
finished dept calculation
updated debt calculation, "fixed" weird floating point bug, added calculating method dropddown
added defrayed functionality
Merge remote-tracking branch 'origin/felix'

Conflicts:
	ass03-client/app/index.html
	ass03-client/app/scripts/app.coffee
	ass03-client/app/styles/main.scss
	ass03-client/app/views/navigation.html
	ass03-server/src/main/java/de/unikoblenz/ptt/lord/ass03/resources/ArticleResource.java