enhancements to rotation and orientation functions
* in iOS 7 touching in 'up' orientation now works
* rotate(dir) now works when device is in
  - 'face up'
  - 'face down'
  orientations
Merge pull request #218 from jmoody/0.9.x-enhanced-rotation-and-orientation-functions

iOS 7 touches work in orientation 'up' and rotate function works when orientation is 'face up' or 'face down'