Improved error handling (introduced debugsession commandline argument). Startup/shutdown now more verbose. SSE checks if project was compiled with SSE(2)... not sure if windows would reach it if hardware lacked support, but linux/mac may (from V2). Fixed Mac crashes in deferred.

indra/newview/llviewerobjectlist.cpp

@@ -957,7 +957,8 @@ void LLViewerObjectList::killAllObjects()
 		objectp = *iter;
 		
 		killObject(objectp);
-		llassert(objectp->isDead());
+		// Object must be dead, or it's the LLVOAvatarSelf which never dies.
+		llassert((objectp == gAgent.getAvatarObject()) || objectp->isDead());
 	}
 
 	cleanDeadObjects(FALSE);