3.1.6

• Deprecating delta, deltaX, and deltaY event handler arguments
• Update actual event object with normalized deltaX and deltaY values (event.deltaX, event.deltaY)
• Add deltaFactor to the event object (event.deltaFactor)
• Handle > 0 but < 1 deltas better
• Do not fire the event if deltaX and deltaY are 0
• Better handle different devices that give different lowestDelta values
• Add $.event.special.mousewheel.version
• Some clean up