Docs: getAll(), setAll()

[sidewayss]

Color.prototype.getAll() and .setAll() are not currently documented in the readme or the online docs.

[LeaVerou]

If these are not documented, get() and set() also won't be (though I'm pretty sure we use them in examples). I think that's pretty high priority as far as docs are concerned (though moving to Typedoc for the API docs see #424 should help mitigate the need)

[sidewayss]

set() is used in examples in the readme for sure. I don't think get() is used in any examples.