railgun exploit

[mortis]

New etpromapscripts for railgun:

1. railgun bugfix:

Uses fakebrush to keep players out of oil tank
Uses trigger_hurt to punish exploiters who manage to get in anyway

http://images.bsdterritory.com/Mortis/railgun.script

2. railgun fun (if you want to spice things up):

same bugfixes as #1
allows axis to spawn at CP when built (thanks seven_dc)
reduces map duration from 30 minutes to 20 minutes

http://images.bsdterritory.com/Mortis/railgun_fun.zip

--Mortis