At the moment a "Generated Topic Detail" comment is added to topics at creation time.

This information is redundant inside the Skynet interface, but is very useful when the topic is exported, such as when a book is built. Topics are exported with human readable filenames, and having the topic ID in the topic xml aids in debugging.

The topic detail comment should be generated when the topic is streamed out of skynet however, rather than at creation time. 

Problems with generating the topic detail at creation time and then leaving it alone include desynchronisation of metadata, and also the wrong topic ID being specified if topic xml is copied wholesale [refer to https://bugzilla.redhat.com/show_bug.cgi?id=817725].

What would be useful is this:

1. Generate the topic detail comment whenever the topic is streamed out of Skynet.
2. Do not include in the topic inside Skynet;
3. Instead, show the topic detail as a summary on the same page as the Topic XML, perhaps beside it.