Update css helper, touch scroller, and touch tracker.
Edge case: prevent scroll weirdness…

* When coming back from out of bounds when scroller is non-paged and scroll content isn't larger than the scroll container (doesn't actually need to scroll).
Updates to touch scroller & touch tracker
Cancel click event on touch end to allow another follow up click.
replaced 'tranny'
Merge pull request #10 from hughrawlinson/master

replaced short word with full word
WIP
Use image-url

asset-url doesn't like being called with a second argument