This changes fixes#25 by restructuring the forum models in a way
compatible with the polymorphic behavior of SQLAlchemy. Incidentally,
the new form turns out to be more appropriate for our use than the
polymorphic one originally used.
The migration for this task is non-trivial because the Thread class was
created with a foreign-key id which thus had no auto-increment or
associated sequence. The most reliable way of getting it back was to
recreate the table because SQLAlchemy ony performs automated sequence
introduction at table creation time. Four separate migration files
perform the whole change.
This commit also adds views and forms to create topics, and the
boilerplate for an advanced markup editor that can be used as a widget.
This commit adds a forum tree YAML file (URL-based rather than an
actual tree...) and the 'forums' and 'create-forums' commands for
the master script.
A page /admin/forums is also used to currently display the forum
tree, although this will probably be turned into a full table with
forum descriptions, and a form with edition capabilities.
Darks
Lephe