Added Gallery::Drawing mongo model
added empty project for clerk
enabled mongodb in travis
Merge branch 'master' into clerk

Conflicts:
	drivethrough/Gemfile.lock
	gluegun/Gemfile.lock
Fixed up gemfiles
Added mongodb helpers to test and used them in commons
added failing test for clerk
updated collages queue to support subscribe
fixed drawing queue not being dropped properly
Implemented very simple clerk
made clerk sync stdout and stderr to output nicely with docker
Merge branch 'master' into clerk
fixed docker build with hack
fixed mongodb docker run