SRM firerate is not same as the current NT's value

[kassibuss]

The weapon script does not read the value and instead its hardcoded

GetFireRate for srm in weapon_srm.h should be 0.6f instead of 0.8f (which is the SRM-S value)

EDIT: This would also require changing the damage of the srm back to 12 instead of the 16 that it has in the revamp

[kassibuss]

Fixed by PR #119