Issue #1603 - Part 1: Reorganize ScriptLoader/ScriptElement

- Moves scripting parts of DOM into 'dom/script'
- Renames nsScript{Loader/Element} to Script{Loader/Element}
- Adjusts all callers

dom/base/nsContentPermissionHelper.cpp

@@ -29,9 +29,8 @@
 #include "nsIDocument.h"
 #include "nsIDOMEvent.h"
 #include "nsWeakPtr.h"
-#include "ScriptSettings.h"
 
-using mozilla::Unused;          // <snicker>
+using mozilla::Unused;
 using namespace mozilla::dom;
 using namespace mozilla;