added viewzoom extension to QC and client (smooth sniper zooming, with sensitivity...

added viewzoom extension to QC and client (smooth sniper zooming, with sensitivity scaling)
protocol should be able to masq now (not a perfect fix like net_chan, but a fix for most people - I hope) - server waits to send serverinfo until first reply from client (any clc_ message will do), client spams clc_nop every 3 seconds until it gets serverinfo (FIXME: maybe only once would do?)
upgraded aiming angles sent from client to floats in DPPROTOCOL_VERSION2 mode
updated cl_shownet 2 svc name list in cl_parse.c (it was quite outdated)

git-svn-id: svn://svn.icculus.org/twilight/trunk/darkplaces@1539 d7cf8633-e32d-0410-b094-e92efae38249