Further header cleanup and a few updates

Updated llstring to current linden
Further linden_common cleanup
Header cleanup
Raised banlines to 5000 as per linden server change
Included missing llmediaentry.cpp file
Minor whitespace changes here and there

indra/newview/llvoavatar.cpp

@@ -40,6 +40,7 @@
 #include "llaudioengine.h"
 #include "noise.h"
 #include "llsdserialize.h"
+#include "raytrace.h"
 
 #include "llagent.h" //  Get state values from here
 #include "llagentcamera.h"