touch-action: scroll will allow native scrollers inside touch-action: none
clean up findElements call
remove ununsed
touch-action: none in a scroller will let the scroller scroll
Add initial support for pan-x and pan-y touch-action
mark elements for scrollability
Support pan-x and pan-y scrollers.

- After making determination of scroller or event emitter, stop the other option
from happening
- Needs testing on iOS with -webkit-overflow-scrolling: touch
Add a simple scroller example
clean up state for scrolling
One move is enough to determine scroll or events

- Since one move is all we have on -webkit-overflow-scrolling: touch, just use
  an axis > other axis check
add linear-gradient for other browsers
remove unused hysteresis const
remove console log
`touch-action: scroll` will make pointerevents if no scrolling is detected.

- Greatly simplifies the installer logic :)
Merge pull request #27 from azakus/scroll

Add scrolling support