64-bitifying and replace deprecated method.
Project cleanup.
Removed old catalog entry (Documentation (pre 05.06)).
* Removed unnecessary code to right arrow into Xcode
* Removed path requirement since Xcode doesn't have to be in `/Developer` anymore
* Changed Xcode bundle id from com.apple.Xcode to com.apple.de.Xcode
Updated developer applications catalog entry. There is now one for Xcode versions up to 4.2, when Xcode and the Developer Tools were still installed in /Developer. And another one for newer Xcode versions (>=4.3), when the Developer Tools are installed in /Applications/Xcode.app. Each shows up only if the corresponding path exists.