Allow library users to register for touch/doubletap events
Changed State enum to private
Fixed bug so scaleType can be set in XML
Added fixTrans to setZoom
Swapped out assets for smaller assets.
Added min API 8 to README
Fixed bug with setZoom called before onMeasure.
Merge branch 'doubleTapListener' of https://github.com/singpolyma/TouchImageView into singpolyma

Conflicts:
	src/com/example/touch/TouchImageView.java
Updated README
Merge branch 'singpolyma' into dev