[pygtk] Gaphas 0.5.1 release

[Arjan Molenaar]

Hi all,

A new version of Gaphas is out. Gaphas is a diagram widget written in Python. It uses Cairo for rendering.

This release fixed the following issues:

- Can't undo deletion of a connected element properly
- Fix horizontal toggle got orthogonal lines
- Orthogonal lines should have at least 2 segments

Also quite some documentation updates have been done.

Regards,

Arjan