(svn_edit_content_t): can include a tree delta as content.
(svn_edit_content_t): can include a tree delta as content.

(svn_ver_t, svn_user_t): cosmetic fix: use the `_t' suffix even in the
structure namespace, for consistency.

jmckaskill/subversion,jmckaskill/subversion,jmckaskill/subversion,jmckaskill/subversion,jmckaskill/subversion,jmckaskill/subversion,jmckaskill/subversion,jmckaskill/subversion