convert "back to list" view to ng-click action (fixes #21)
add function for extracting focus category
remove extraneous rating counter

Signed-off-by: Levi Tan Ong <levi@byimplication.com>
Merge branch 'master' of github.com:by-implication/Badger into crazylayout

Signed-off-by: Levi Tan Ong <levi@byimplication.com>

Conflicts:
	app/views/explore.scala.html