Changes

Fix pipe base rendering + make wire rendering *work*
-ModelCacheHelper.ModelValue still needs to have a GL call list created
so we can move wire rending back to a TESR.
Gate + Pluggable static models are next, but it might need new API to
use the caches properly if you don't depend on BC. Probably need a
system to allow it either way (fast vs not-requiring BC core).
This whole system should probably be done in a seperate branch if you
want to release 7.2.1 ASAP asie
 (commit: ee7fd04)

I thought these were import order messing up, turns out they were
important :/
 (commit: 6f01e3e)