TouchImageViewListener added to public API.
Added SingleTouchImageViewActivity example
Added MirroringExampleActivity
Bug fix so that stretching image to super min and max will be mirrored correctly.
Bug fix: All TouchImageViewListener calls moved to after setImageMatrix call.
Added getZoomedRect to SingleTouchImageViewActivity example and rounded floats to 2 decimal places.
Added getCurrentZoom and isZoomed to SingleTouchImageViewActivity example.
#78 Fixed float rounding issue which caused TIV not to animate back exactly to normalizedScale == 1.