Implement <list> IDs

[jaredmorgs]

Tracked from the issues marked with an asterix in https://github.com/opendevise/docbookrx/blob/master/WORKLOG.adoc

[mojavelinux]

Sample input:

<itemizedlist xml:id="name">
<listitem>
<simpara>item one</simpara>
</listitem>
<listitem>
<simpara>item two</simpara>
</listitem>
</itemizedlist>

Expected output:

[#name]
* item one
* item two

Actual output:

* item one
* item two

NOTE: I would like to use the shorthand [#name] instead of [[name]].