Avoid SSE2 intrinsics in initializers.
Fix build on GCC 4.6

Conflicts:
	src/engine/framework/FileSystem.cpp
Cvar: fix Cvar::Cvar.Set being wrong
Rewrite integer parsing functions
Apply Modelscale in LerpTag for MD5 models.
Fix SSE alignment issues in QVM code.
Adjust /r_showSkeleton bones correctly when modelscale is set.
Improve precision for inverse square root on SSE math.

The lower precision caused vibrations in the iqm and md5 animation.
Fix listmaps output, broken by print/log refactoring.
Fix up /editbind.
Add compose & menu to the modcase modifiers list.
Merge branch 'master' into engine-upgrade/filesystem_wip