Improve Taurus extensions API documentation
This PR partially solves one of the tasks from the Documentation Camp board:
We should document API of the taurus extensions methods like: count, move, etc. so it contains explicitly the timeout argument.
Maybe it does not document the methods itself but give a short introduction to the Taurus extensions modules: sardana.taurus.core.tango.sardana
and sardana.taurus.qt.qtcore.tango.sardana
.
It also adds to the API documentation the whole part about the Taurus Qt extensions.
Finally it also fixes broken links from FAQ "How to call procedures?", so it fixes #1228 (closed).
@sardana-org/integrators could you please take a look on this and eventually integrate? Thanks!