Sync with Upstream Alchemy

Changes LLEnvManagerNew::setRegionChangeCallback to LLAgent::addRegionChangedCallback
Cleans up some of the timeout policies that aren't necessary any longer.
Modernizes parts of LLViewerKeyboard, updates llregistry.h
Begins changeover from LLDynamicArray to std::vector
Minor merge of newer, trivial SSA functions.
Introduces LLAgent functions: addParcelChangedCallback and canJoinGroups
Support for secondlife:///app/appearance SLapps.
Cleans up older functions.

indra/llwindow/llkeyboard.h

@@ -28,6 +28,7 @@
 #define LL_LLKEYBOARD_H
 
 #include <map>
+#include <boost/function.hpp>
 
 #include "string_table.h"
 #include "lltimer.h"
@@ -40,7 +41,7 @@ enum EKeystate
 	KEYSTATE_UP 
 };
 
-typedef void (*LLKeyFunc)(EKeystate keystate);
+typedef boost::function<void(EKeystate keystate)> LLKeyFunc;
 
 enum EKeyboardInsertMode
 {