OSX can be a static shader option.
Convert deathcam to a dynamic shader flag for perf.
Save some instructions here by consolidating lines.
Trying to support OSX by supporting PS20 (not b) and reducing instructions.
Merge branch 'master' of https://github.com/BSVino/DoubleAction

Conflicts:
	mp/src/materialsystem/stdshaders/fxctmp9/slowmo_ps20.inc
	mp/src/materialsystem/stdshaders/fxctmp9/slowmo_ps20b.inc
	mp/src/materialsystem/stdshaders/slowmo.cpp
	mp/src/materialsystem/stdshaders/slowmo_ps2x.fxc