remove swiping from docs

swiping was killed in 0.4.1 (n8han/pamflet@22b27b35ede88ca7fe4c4658230cb16d0badf7bc):
> * Removes swipe actions for page navigation as these were unreliable on some mobile browsers and caused problems scrolling.

I experimented with [Quo.js](http://quojs.tapquo.com/) but came to the same conclusion.
- It didn't work reliably on mobile version of Chrome.
- When it did work on HTC's "Internet" app it was worse because it interfered with my trying to read the page by jumping around unpredictably.

For now I think we should remove swiping from the docs.