Room taken logic needs refactor

[codysherman]

The "Room Taken" message seems to need some lovin'.

The two problems:

1. Making sure it does appear on first attempt to create a room, when the room is taken.
2. If you stop a room you're streaming and quickly try to restart the room, it says it is taken. That's fine, except then it seems like no matter how long you wait it from that point on will always have the taken message unless the page is manually reloaded.