2008-01-08Merge
Alpar Juttner <alpar@cs.elte.hu> [Tue, 08 Jan 2008 20:26:48 +0100] rev 51
Merge

2008-01-08Improved groups.dox.
Peter Kovacs <kpeter@inf.elte.hu> [Tue, 08 Jan 2008 04:26:27 +0100] rev 50
Improved groups.dox.
Added missing brief descriptions.
Changed descriptions to be unifom.
Some minor fixes.