Future iOS SDK compatibility.

Makes app work with SDK's that do not contain UITouch->_gestureView.
Work around defect in current betas where accessibilityValue may return an NSAttributedString.
Address issues where an application's keyWindow may not be a member of the windows array.
Increase the timeout between scrolling to a cell and looking it up.

Note that the latest simulator release has issues with accessibility and the tests will need to be run on device or with an earlier simulator.
On iOS 7, the text property isn't immediately updated, so wait for that to happen
Formatting Changes
Merge pull request #18 from j-mutter/ios-7-compatibility

Adds iOS 7 Compatability