- converse-muc.js was overriding the global "converse" variable
with undefind (the factory function didn't return anything)
- locales was not defined in utils.js in non AMD (not passed in
the factory function)
First component to remove is MUC which was moved to src/converse-muc.js
The components are written as plugins and use converse.js's plugin machinery.
Update the plugin docs somewhat with new insites found while working on the muc
plugin.
