Hg 88 pan/zoom

- pan in media lightbox
- doubltap to set scale to 3
- zoom with pinch
- pan while zooming
- still support swipe to next image, but only when not zooming
value in setters might be optional yes,
if you have a property 
you can create a setter by checking if arguments.length > 1 or in this case if value exists
and do something with it

http://emberashes.com/blog/2012/12/23/getters-and-setters-in-ember-dot-js/