Code review comment for lp:~ian-clatworthy/bzr/user-ref-topics

This branch formats the User Reference as a set of topics. Improving the formatting of the User Reference in this way was recently discussed and agreed to on the bzr-doc mailing list. The formatting and cross-linking of numerous topics has also been improved.

As a side effect of this change, each help topic is now available as http://doc.bazaar.canonical.com/test/en/user-reference/xxx-help.html. The old "conflicts" help topic has been renamed to "conflict-types" so that the conflicts command and it don't map to exactly the same URL.