Move the signout button into the header; reposition the user logo.
Make the text disappear behind the signout button and improve the layout a bit more
Merge pull request #46 from Standard8/header_improvement

Move the signout button into the header; reposition the user logo.
Properly handle the temporary constraints for turning off the data channel
Pass constraints as undefined if we're not setting any values
Merge pull request #47 from Standard8/fix_peerconnection_api

Properly handle the temporary constraints for turning off the data chann...