If not mistaken, this is used by GNOME's Gitlab to set maintainer role,
which is also needed to push release tags.
This has been discussed with mitch and schumaml on IRC and agreed upon
by everyone.
Make gimp.doap compliant to the new DOAP file style (GUADEC 2014):
* Add new mandatory fields 'description' and 'programming-language'.
Add download page URL.
Add bug-tracker URL.
Add programming language.
Set category to Apps.
Move Sven Neumann from maintainer list to AUTHORS after querying him.
Unify description in gimp.doap and gimp.appdata.xml.in.