This reverts commit eb945ddf.

Hide a bunch of debug logging statements in #ifdef SHOW_DEBUG to prevent spinning a mutex in hot paths.

SL-14183, SL-14142 - impostor management improvements, animesh attachments update on frames when their parent does

Provide method of storing joint indices sep from weight data for faster runtime processing.

Clean up deferred\alpha shader to allow re-entrant graphics switching (link error on 2nd compile/link of deferred shaders).

Clean up some uses of pragma(optimize,...).

SL-966 - behavior improvements and visualization, bonus removal of unrelated duplicate code in llappviewer.cpp

SL-9773 - treat animated object attachments the same as other rigged attachments for purposes of visibility in mouselook.

SL-1291 - fixed some issues with selection highlighting of objects rezzed while in build mode. Not clear whether this addresses the original issue, which isn't reproing

SL-966 - animated object size/pos constraints cont, including some settings for debugging. additional options to anim_tool.py for making test animations

SL-966 - size and pos limit calcs moved to sep method. Global scale option for testing of size limits.