[TIMOB-4157] SplitView option to show master view also in portrait

This is a feature request to add a property to the Split View for iPad that will allow the master view (left view) to always be visible, no matter the orientation of the device. In the source code, this is done by simply changing the "return" of this function to YES (MGSplitViewController.m)

~~~
- (BOOL)shouldShowMasterForInterfaceOrientation:(UIInterfaceOrientation)theOrientation
{
	// Returns YES if master view should be shown directly embedded in the splitview, instead of hidden in a popover.
      return ((UIInterfaceOrientationIsLandscape(theOrientation)) ? _showsMasterInLandscape : _showsMasterInPortrait);
}
~~~

A helpdesk ticket is asking for this: http://support.appcelerator.com/tickets/APP-233998/homepage