Ios windows refactor

WindowProxy rewrite for IOS7 support

FR
1. KS
2. KB tests
3. Rotation Tests
4. Tab Group Memory Tests
5. Email, Contacts, Media (All modal/popover stuff)
6. Open Close Focus Blur events

Known behavior changes 
1. The default modal window no longer has a nav bar
2. Modal windows only support orientations as specified by their orientationModes property
3. Ti.UI.setOrientations is dead
4. Changing orientationModes after window is open is a no-op