+ submenu for key assignment, fast_move and free_move can now be toggled

configwriting/saving isn't complete and will break your config if you use fancy keys

MacOSX build support

a work-in-progress map modified callback interface (committing because i want to merge the fence stuff)

Added a check that avoids server crash (unhandled exception) when map generation is attempted near limit

--HG--
extra : rebase_source : e8ec407f60711d42d33be4811b2880088f617b5b