Hex-mode support added to the engine; a simple 'core.fov.set_algorithm("hex")' in your module's load.lua and you are in hex mode!
Directly computing directions is deprecated; instead use util.adjacentCoords and all the new coord functions


git-svn-id: http://svn.net-core.org/repos/t-engine4@4868 51575b47-30f0-44d4-a5cc-537603b46e54