Add third argument to gadget:GameSetup, return true/false to hide/show the ready button & player list
Revert "Add third argument to gadget:GameSetup, return true/false to hide/show the ready button & player list"

This reverts commit 643521b13935ad3c673e1890b79ac44ded5915b2.
added Spring.AssignPlayerToTeam(playerID, teamID)
Merge branch 'develop' of git://github.com/spring/spring into develop
make Spring.AssignPlayerToTeam sync safe
fix 4380
fix compile
shadows: add safemode value & fix -1 force off
Lua: remove some duplicated code
fix compile
fix grabinput toggling

fixes #4383
Font: fix a logic error in an iteration loop
fix another of same kind
changelog++
added VFS.UnmapArchive
fix #4392 plus minor bug in QuadField
fix #4395
added SetAlly
Update changelog.txt
fix Lua-stack management^C style in VFS.{Un}MapArchive