Simplify the boilerplate HTML require even more.

Use id 'conversejs' instead of 'chatpanel'.

The controlbox toggle is now generated via a backbone view, you don't need to
manually include it in your markup.
Merge branch 'master' of github.com:jcbrand/converse.js

Conflicts:
	converse.js
	docs/source/index.rst
	index.html