tweaked cl_maxfps a little. now sticks much closer to the desired rate. also tweaked cl_netfps. clamps 77fps to 13ms frames (read: 76.9 fps) in an attempt to avoid tripping up any framerate checks (we had previously been using a lower net rate with occasional 14ms frames).
viewspace particles are now a thing.
greater control over spawning particles. its now possible to spawn particles only in slime, etc.
fix soundlength builtin.
preliminary version of r_dynamic -1, which can give some significant framerate boosts on certain maps.
fix halflife bsp texture issues.
rewrote worker thread logic. workers now work as a single pool, instead of independent pools. this means that you don't have to wait for a specific thread to finish before it can load new stuff, reducing overall load times some more. worker_count cvar allows reconfiguring the number of active workers. can be changed any time.
updated mod_terrain_create command. should be more useful now and make more sense when first loaded.
fix lit support. apparently its been broken for a while.
brush editor now has csg subtraction.
git-svn-id: https://svn.code.sf.net/p/fteqw/code/trunk@4990 fc73d0e0-1445-4013-8a0c-d673dee63da5
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