Archery masteries now have a description of the damage they provide.

Fixed targeting if you self-target.
Static map generator can now take an entity as {random_filter={...}} to generate a random entity
New zone: the Flooded Cave
New zone: the Caverns of Osse


git-svn-id: http://svn.net-core.org/repos/t-engine4@974 51575b47-30f0-44d4-a5cc-537603b46e54