Huge renderer update (WIP). Still plenty to do, especially pertaining to UI.

-Nametag bubble visbility is oddly inconsistent. May vanish with future planned UI merges...
-VBOs are PAINFULLY slow on ATI hardware. This repos self-compiled davep/shining-fixes branch, so I'll leave the ball in LL's court for now regarding that.

indra/llui/llslider.cpp

@@ -40,7 +40,7 @@
 #include "llfocusmgr.h"
 #include "llkeyboard.h"			// for the MASK constants
 #include "llcontrol.h"
-#include "llimagegl.h"
+#include "lluiimage.h"
 
 static LLRegisterWidget<LLSlider> r1("slider_bar");
 static LLRegisterWidget<LLSlider> r2("volume_slider");