Refactor is_authorized? so it has the logic centralized in one location for changes later.
Change control_update to control in order to clarify its purpose.
Make chat accessible to authorized users only.
Add authorization for chat in chat_controller.
Refactor drawings_controller to use is_authorized? method.
Give users bold names in chat and members and owners insignias.
Merge pull request #40 from Ravenstine/insignia

Give users bold names in chat and members and owners insignias.
Merge pull request #39 from nicolejpaz/chat_owner_only

Chat for authorized users only
Merge pull request #33 from Ravenstine/master

Add authorization for chat