[TIMOB-8358]IOS: Implementing Localization of Splash Screen.

__Changes that needs to be reviewed to the build process__

* If an Localized Splash Screen exists in the i18n folder, the corresponding splash screen from the global space would be removed. 
* I have removed all items under  > build phase > __Copy Bundle Resources__  for the titanium xcode project as it would always try to copy default.png , along with 'debugger.plist' and 'stylesheet.plist' from app/build/iphone/Resources folder which is not always correct. It would also help in resolving a subsequent ticket [TC-1660](https://jira.appcelerator.org/browse/TC-1660)
![ Copy bundle Resources](https://f.cloud.github.com/assets/847863/51287/3b1b3590-59c9-11e2-9514-9c3caef87d6e.png) 


__TESTING INSTRUCTIONS__

* Import Code from (here)[https://jira.appcelerator.org/secure/attachment/34607/splashtest.zip] into TiStudio.
* Build app for device. 
* Install app on to device.
* Open the app.
* Check if the default appcelerator splash screen shows (assuming your default language is english)
* Kill the app, remove it from background.
* Go to Settings > General > International >  Language , Change language to French.
* Restart the app. Verify that the splash screen has changed.
* Kill the app, remove it from background.
* Go to Settings > General > International >  Language , Change language to any other language.
* Restart the app. Verify that the splash screen defaults back to the english one.(appcelerator splash screen).

* I have also included another .png image `Copy of Default.png` inside the i18n folder which should not be copied during the build (Just to sanity check that the regex actually works and does not copy over any thing other than the required splash screen images.)