- Fix source link

- Update to version 0.5
* Port to Qt 5 framework
* New QSettings native format for config files.
* In the diagram editor, the grid is not displayed by default
outside the diagram, the minimum zoom is blocked.
A button allows you to un-validate this operation.
* It is now possible to put the tittle block on the right vertical mode.
* The default tittle block can be defined for the next folios of the project.
* The summary now takes the font set in the QElectroTech.conf
* The floating dock is now operational, variables, actions are taken
into account on the fly.
* A transformation tool transforms quickly and finely each primitive by handles.
* Add UUID tag for element XML.
* The database enables faster loading a large number of managing symbols
in tables changes pixmaps collections, it no longer compares the modification
date of the files but their use UUID attributes to update the cache .
* In terms of basic shapes, the transform tool works directly on vectors,
it replaces the reduction tool / enlargement that has just been deleted as unnecessary.
* Improve Undo command by QPropertyUndoCommand class.