- changed sv_ready_restart to use a qc based restart function as suggested by nifrek...

- changed sv_ready_restart to use a qc based restart function as suggested by nifrek (still experimental, please test! assault, arena & onslaught are still using the "restart" command atm)
- added missing variable for g_runematch cvar
- moved precaching to a new function which is called after all cvars are read (InitGameplayMode() is now the only place where gamemode cvars are read)

git-svn-id: svn://svn.icculus.org/nexuiz/trunk@3020 f962a42d-fe04-0410-a3ab-8c8b0445ebaa