[devtools] make PostgresTestDataBaseHandler start its own postgresql
Don't depend on postgresql already running on the system, or on a static
config.
To use this, set the configcls attribute of your CubicWebTC-derived test
class to PostgresApptestConfiguration.
Caveats:
- this won't work with several tests running concurrently from the
same directory, since each would start its own cluster with a shared
data directory and stomp on each other's toes
- you need initdb/pg_ctl in $PATH, e.g /usr/lib/postgresql/$version/bin
on Debian/Ubuntu systems.
Closes #3489631
Once you have read the `RQL tutorial`_ and you know the application'`schema`_,
you're ready to define your own views. Just type the RQL query retreiving data
you're interested in in the search field. If the view used to display them
doesn't fit your need, choose another one in the possible views box (this box
isn't displayed by default, but you can activate it in your `user
preferences`_). Once you're satified, add a `bookmark`_ if you want to reuse
this view later.
.. _`RQL tutorial`: doc/tut_rql
.. _`schema`: schema
.. _`user preferences`: myprefs
.. _`bookmark`: doc/bookmarks
Below are some example of what can be acheived...
.. winclude:: custom_view_last_update
.. winclude:: custom_view_rss