Revert "Disabled snapvector functionality."

This reverts commit 6a9a24a39acdef6f2af7ef5b5d9f373338550d8b.
Changed score_info to use namelog, new option for score penalty on early quit.
Fixed the cvar set issue after client disconnect.
Added support for setting player score through score_info.
The old team is no longer stored as part of persistent data when leaving team.
Add support for Weak Sudden Death

After it strikes, it's not possible to build near the Reactor/Overmind
and it's not possible to build refineries/creep colonies. This still
allows teams to build forward within the BP limit, but not strengthen
their main bases any more.
Add a command for starting Weak Sudden Death