Added a check so that if the document scrolled a distance in 0 time. For example in a single mouse wheel scroll. It behave as this occured over the course of a single frame at 60fps.
Added update debouncing
Merge branch 'master' of git://github.com/AdaRoseEdwards/ftscroller into AdaRoseEdwards-master
Back out the update debounce changes not intended for this pull request, and clean up code for the 0 time to match the rest of the source style