Fix testMovingASlider on iPad by tweaking layout

Change the auto-resizing mask on the "Other Text" text field.
With the previous mask, the test testMovingASlider would fail, as the "Slide"
slider was positioned behind this text field.
Fix testReturningFromATextField on iPad by waiting for keyboard to appear

On iPads, the keyboard takes a little time to appear, and pressing 'return'
before it has appeared doesn't do anything. Wait a little bit for the keyboard
to appear.
Fix rotation so it works in iPad simulator
Make sure rotation is done before next one begins

Thanks to @hiltonc.
Merge pull request #305 from phatmann/fix-ipad-sim

Fix rotation so it works in iPad simulator
Update podspec for 3.0.3
Merge pull request #297 from canton7/feature/ipad-test-fixes

iPad test fixes