Added ARC support for OpenInChromeController, modernized sample app a bit

OpenInChrome: Removed an autorelease and added a CFBridgingRelease

Sample App: Changed some "retain" properties to "weak" for interface elements, removed unneeded synthesize calls, used OnInChromeController sharedInstance

Please go ahead and give my non-ARC to ARC changes a good look. Memory management is not my strong suit...