Add routines in Util.cs for conversion of region handles to region
locations and for the conversion of region world location to region
'region' location. These routines will replace all the arithmatic
scattered throughout OpenSimulator.
varregion: send region size in LLLoginResponse.
varregion: Add region size to teleport event messages (EnableSimulator,
CorssRegion, TeleportFinishEvent).
Have Simian grid service return the region size.
Many teleport related debug log messages. Can be removed when teleport
works (like that's ever going to happen).

Conflicts:

	OpenSim/Framework/RegionInfo.cs
Remove some chatty DebugFormat statements. No functional changes.
Some missing definitions needed for successful compilation.