Changelog for #147
fix issue:
    onTouchEnd did not call the correct mouse up handler
Updated for 0.9.129
Updated for 0.9.130 (In progress)
OpenSeadragon.now() returned undefined the first time; fixed
Update changelog
for fix I made to onTouchEnd:

1. remove IE8 related code as it does not support touch anyway
2. use event.changedTouches [ 0 ] rather than event
Merge pull request #159 from ethanli83/master

Fix for onTouchEnd
changelog update for #159