-Screwed around with SSE2.

-Added ReleaseSSE2 as a build target.
-LL_VECTORIZE is silly and breaks things...
-Small little tweaks.

I have not tested if the cmake alterations work under linux and darwin. Hollar if broken.

indra/llmessage/llinstantmessage.cpp

@@ -357,7 +357,7 @@ LLPointer<LLIMInfo> llsd_to_im_info(const LLSD& im_info_sd)
 		param_message["message"].asString(),
 		param_message["id"].asUUID(),
 		(U32) param_message["parent_estate_id"].asInteger(),
-		im_info->mRegionID = param_message["region_id"].asUUID(),
+		param_message["region_id"].asUUID(),
 		ll_vector3_from_sd(param_message["position"]),
 		param_message["data"],
 		(U8) param_message["offline"].asInteger(),