jQuery version was extremely old, and was probably stuck at that as a way
of enabling the frivilous use of entwine on the front end for somewhat
trivial ajax submisions. A mild refactor has taken place to leverage newer
jQuery features, and remove outdated dependencies.
Also accompanying this commit are alterations to the markup to make it
more semantically correct (probably not entirely though), and help with
testing the JS functionality of reply forms (when enabled).
In CWP 1.x there was an extension hook to allow alterations to the commenting form.
Since the upgrade of this module for CWP 2.x this was no longer there, meaning functionality
that relied upon it no longer worked. This commit reintroduces this functionality to keep
other modules that apply extensions to that hook, happy.
