added a reverseTouchDrag parameter (#3761)
added a reverseTouchDrag parameter (#3761)

Equivalent to reverseMouseDrag for mobile and tablet.
aframevr/aframe,chenzlabs/aframe,chenzlabs/aframe,ngokevin/aframe,ngokevin/aframe,aframevr/aframe,dmarcos/aframe,dmarcos/aframe