tigefa4u projects Trac

Force Babel 0.9.3 since it fixes some plurality issues.

TracMercurial for 0.12: `MercurialRepository.next_rev(rev, path)` now takes into account path information (only when path is a file, directory still not supported)

TracMercurial for 0.11: backported r7342 (''follow first parent/child'')

TracMercurial for 0.12: for previous/next rev, always use first parent/child (i.e. stay on the branch).

WikiRename: illustrate the transition towards use of context manager and `with` statement, for `transaction` (requires Python 2.5 - not meant for trunk).

WikiRename: transaction code clean-up, use local functions.

WikiRename: fix admin console unit-tests (missing WIKI_RENAME in the list)

WikiRename: added a functional test for the wiki rename operation

- create wiki page with one attachment
- try a few pathological rename (to itself, to existing page)
- do a real rename, leaving a redirection page in place
- check for the attachment move, for the redirection page
- do another real rename, this time without redirection
- check the original page is gone

WikiRename (rebasing r6424, r6497): add the possibility to leave a redirection page for pointing to the renamed page.

This is admittedly a poor way to fix dangling links, but perhaps the most effective one in the current state, as it's not really possible for now to go back to all the wiki texts (on wiki pages, tickets, ...) that may contain a link to the old page and update them.