Prerelease without AVX

Compiled with AVX disabled (and now hopefully with all AVX intrinsics removed).

First pre-release

This is a first prerelease of my fork of the HDT-SMP plugin. Notable changes include:

• Distance check in ActorManager to disable characters more than a certain distance from the player. This should also resolve the massive framerate drop in certain cell transitions. Default maximum distance is 10000, but can be changed in the <smp> section of configs.xml - for example, <maximumDistance>2000.0</maximumDistance>.
• Much stricter about when systems are enabled and disabled, which should reduce slowdown over time (and occasional crashes).
• New mechanism to remap mesh names in the defaultBBPs.xml file, making it easier to define complex collision objects for lots of armor types. However, I haven't fully documented this yet.

All of the configuration changes use new tags, and shouldn't break any existing behavior. It should be compatible with any existing configurations.