fix attack_finished bug blocking weapon switching

fix attack_finished bug blocking weapon switching
weapon priority lists; non-critical impulses reordered (cleaned up)
fix inverted condition in func_door_secret
i wanna see the packetloss with sbar_columns all
Dieselpower: Changed MG ammo to SG ammo. There is no MG here.
Added new entity: "func_breakable"; functions the same way func_assault_destructible does, but it's for general gameplay use (IE destructible glass, crates, etc.)
enabled chat flood protection by default
support teamed items
g_weaponreplace_*
Capitalize some words in the FAQ
renamed g_tourney_warmup_unlimited_time to g_tourney_warmup_limit and default it to 60 (-1 is totally unlimited, 0 is up to timelimit, other values limit it further)
being limited to 60 seconds, next step is to enable g_tourney too by default (i think CSQC needs to show this in a good way first, we try this later)
do not require items in Race
maybe missing initialization breaks ready-restart so much on my ctf server?

git-svn-id: svn://svn.icculus.org/nexuiz/branches/nexuiz-2.0@4365 f962a42d-fe04-0410-a3ab-8c8b0445ebaa