Improved terrain generation

Upgraded terrain generator to reduce the size of the seams between the
terrain segments and make the perlin noise pick up between them.  The
meshes are physically located correctly but don't line up always, seems
to be a perlin noise issue however.  Should be easy to fix, easy enough
to hide for now.

Also had it start painting an entire island over the network, seems to
be going well but it is a very slow operation on load.  I'll have to
find a way to speed it up later.