Bug fixes, weapon balancing, everything now works without wire

Railgun speed increased, Particle Beam nerfed, pretty much everything in
realistic weapons balanced, made GUI text more readable, fixed a bug
with stargate shield compatibility, fixed core/safezone not working
without wiremod installed, fixed all blastdamage weapons being really OP
on pewpew cores, fixed a bug with big props and range stuff, gave pewpew
safezone a slider for range.