Version 13.04.7
Fix doctest utility.
[wx->Qt] Update version check utility.
Improve release process.

Automatically upload released file to sourceforge, and update version info
on http://wxgeo.free.fr
Fix text and label editing in object context menu.
Improve label editing.

Add (currently failing) test corresponding to issue FS#240.
[Geolib] Fix issues FS#240 et FS#266 concerning labels.

Labels involving formulas were not always correctly updated.