Some bug fixes and imrovements! [v0.67]

Changes were done to the netcode. They should altogether result in more fluent multiplayer experience.
Fixed the issue where players sometimes would get stuck to ice, unable to jump up from it.
Fixed issues with scoreboard sometimes not proreply displaying mid-game and post-game.
Fixed an issue where the gained experience sometimes wouldn't calculate properly when playing with bots.
Maps that had required player count from 4 to 10 were changed to from 5 to 10.
Fixed the issue where in private games Custom Settings would always be enabled, after hosting a room.