Fix for autoScroll on Windows Phone 8.1 IE 11 devices
Add non ms prefixed maxtouchpoints to see if it's a touch device http://msdn.microsoft.com/en-us/library/ie/hh772144(v=vs.85).aspx
Merge pull request #857 from tsnyder91/master

Fix for autoScroll on Windows Phone 8.1 IE 11 devices #857