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/newview/llappviewer.h

@@ -177,10 +177,12 @@ protected:
 
 private:
 
+	void initMaxHeapSize();
 	bool initThreads(); // Initialize viewer threads, return false on failure.
 	bool initConfiguration(); // Initialize settings from the command line/config file.
 
 	bool initCache(); // Initialize local client cache.
+	void checkMemory() ;
 
 	// We have switched locations of both Mac and Windows cache, make sure
 	// files migrate and old cache is cleared out.
@@ -244,8 +246,7 @@ private:
 	LLUUID mAgentRegionLastID;
 
 
-	U32 mAvailPhysicalMemInKB ;
-	U32 mAvailVirtualMemInKB ;
+	LLFrameTimer mMemCheckTimer;
 	
 public:
 	//some information for updater