Add docs for Keyboard and Touch libraries, which will probably be in v0.7.1 or something.
Add docs for the Either library, Touch.taps, and the new Maybe API.
Add some new examples.
Switch from (<~) to lift to be less confusing to newcomers.
Add docs for new functions and to clarify behavior.
Update docs for Prelude.
Merge branch 'master' of https://github.com/evancz/elm-lang.org

Conflicts:
	public/examples/Reactive/ZipCodes.elm