Fixes #75

Uses Modernizr to detect `-webkit-overflow-scrolling: touch` and when it's available stubs out iScroll to prevent its use (allowing the css scrolling to shine through).
Couldn't hurt to use iScroll lite
Fixed the toolbar and made it its own thing
Finalises the Toolbar fix for css scrolling, etc

Also includes an as-yet unused minimal file list view to try and get more scrolling pert on Android 2.3… the idea is that we could up the max files threshold at least using this.
Conflict resolution in tests/index.html from the scrolling branch