cleaned a lot of weapon code

cleaned a lot of weapon code
merged Attack2 code into Attack code for all weapons to reduce code and improve consistency
changed crylink primary fire from 7 projectiles to 5 to be consistent with secondary fire
added te_smallflash calls when firing crylink, electro, grenade launcher, and rocket launcher

git-svn-id: svn://svn.icculus.org/nexuiz/trunk@397 f962a42d-fe04-0410-a3ab-8c8b0445ebaa