Explicitly set jQuery as a dependency of converse.js

Also in utils.js and otr.js (this will help reach to goal of having a private
jquery which doesn't pollute the global $ var).
Add jquery-private to require config and remove unnecessary shims
Merge branch 'private-jquery'
otr.js also has jquery.browser as dependency
Merge branch 'master' of github.com:jcbrand/converse.js
Close ul tag.