tigefa4u projects Trac

Updated wiki and bumped version number.

Updated WikiStart.

Updated RELEASE and ChangeLog.

Markup branch: migrated the query module

This one was a bit challenging, as structure of the ClearSilver template did not translate to a well formed document.

The ordering of the groups is currently broken.

Also note that the rendering of the results is done in a separate document (query_view.html) so that the !TicketQuery macro will later be able to reuse it.

Markup branch: follow-up to r3666, minor fixes for query.rss

Markup branch: migrated the ticket query RSS feed

Also, make it possible to load a template and preset the data from the Chrome component in one step (currently using `load_template` ... maybe `prepare_rendering()` would be a better name?).

Document the fact that the mimeview API has a few shortcomings which will be addressed in future releases (related to #3332)

Markup branch: migrated the attachment templates

Also:
- migrated list_of_attachments macro (Ticket template now uses it)
- made a preview_file macro (Browser template also uses it)
- some s/to_hdf/data/ renamings

Markup branch: another minor nit for the ''About'' template, no need to have ''About Trac - Trac'' for the title.

Cast timestamp strings into floats instead of ints to avoid problems with custom sql reports. Closes #3476.