New: CPDatePicker Support

- Added CPDatePicker
- Added CPLocale
- nib2cib for CPDatePicker

Test app in Tests/Manual/CPDatePickerTest
Merge branch 'master' into CPDatePickerSupport
Fixed: Make build under rhino to work

Previously, rhino build was failing
Fixed bug about firstResponder. Fixed bug about current date when changing the month (to pass from the 31 to 30)
Merge pull request #1884 from Dogild/CPDatePickerSupport

New: CPDatePicker Support