Remove all the app stuff, since we're going to be a gem-only
Add missing tilt dep
Remove sinatra app code
Explicitly require mail gem
Don't swallow campfire room errors
Explicitly require tinder gem
Add missing requires
wtf tabs
Merge remote-tracking branch 'origin/gemify' into feature/measurements

Conflicts:
	Gemfile
	Gemfile.lock
	lib/librato-services/app.rb
	services/opsgenie.rb