Bug 1362119 - part 1 - Moving dom/base/Script{Loader,Element}.* in dom/script, r=ehsan

This patch does these things:

1. it moves nsScriptElement, nsScriptLoader, ScriptSettings, nsIScriptElement
   and nsIScriptLoaderObserver in dom/script
2. it renames nsScriptElement to mozilla::dom::ScriptElement
3. it renames nsScriptLaoder to mozilla::dom::ScriptLoader

dom/base/Location.cpp

@@ -32,9 +32,9 @@
 #include "mozilla/Likely.h"
 #include "nsCycleCollectionParticipant.h"
 #include "NullPrincipal.h"
-#include "ScriptSettings.h"
 #include "mozilla/Unused.h"
 #include "mozilla/dom/LocationBinding.h"
+#include "mozilla/dom/ScriptSettings.h"
 
 namespace mozilla {
 namespace dom {