[TIMOB-5936] iOS: Application crash on launch on iOS device pre iOS version 4.0 due to module case-sensitvity

Step to reproduce: 1. Create an iphone sub-directory in your Titanium>modules directory (i.e. ~/Library/Application Support/Titanium/modules/iphone) 2. create an app with ti.urbanairship module by adding urbanAirship module which can be found here http://support.appcelerator.com/kb/66/tickets , into the iphone sub-directory you just created. 3. Paste the code below into tiapp.xml *note, you may need to change the version number* ti.urbanAirship 2. Test once with module name as ti.urbanairship (fail case) 3. Test once with module named as ti.urbanAirship (pass case) 4. Run on iOS device with OS version less than 4.0 Actual Result: App crashes on launch Expected Result: App should launch and tab group should be displayed. **Note that this iOS version will not be supported in 1.8.0