Added Touch-punch.js for mobile touch events
Bigger left & right panel drag handles for mobile
Make main page fit viewport width
Tweaks to drag-handles, ovoid overlap of scrollbar
Support full-screen web-app on iOS
Fix drag handle in IE8
Merge pull request #2708 from sbesson/rebased/dev_5_0/tablet_drags

Tablet drag handling (rebased onto dev_5_0)