Updated README, added links to Buildbot.
Merge pull request #145 from deepy/master

Buildbot links in README
Cleaned up and improved userinfo validation, added toggleuserinfovalidation server command
Cleaning up some names in prebuilt VC project (engine->openjk, dedicated->openjkded), fixed prebuilt makefile referencing g_arenas.c, renamed resources for win32
sanity check on sv_maxClients -> cgs.maxclients
Fixed handicap not being clamped properly by gamecode after removing validation from engine