firebase/ios-swift-chat-example — pull request #9 by mcuadros (2014-10-12 12:15:21+00:00)
Title: fixing optionals types at xcode 6.1

Under xcode 6.1, 3 errors appears:
"error: value of optional type 'NSURL?' not unwrapped; did you mean to use '!' or '?'?"

Whit this little fixes, is compiling again.