Added url routing for /files/... and /module/{modname}/files/...

Added CMS_HOOK_RESPONSE_ALTER to give a last chance to alter the response before rendering.
   This hook should not be used, when there are other alternative hook that answer the need, but this is proposed for now, as a way to alter response by adding css, js url, ...
Moved blog under official modules folder.
Cleaned theme of demo example project.
Renamed NODE_MODULE as CMS_NODE_MODULE.

src/hooks/cms_hook_response_alter.e

@@ -0,0 +1,31 @@
+note
+	description: "[
+			Hook providing a way to alter the cms response itself.
+			It is recommanded to use finer cms hook, but this hook is quite general.
+		]"
+	date: "$Date: 2014-11-13 16:23:47 +0100 (jeu., 13 nov. 2014) $"
+	revision: "$Revision: 96085 $"
+
+deferred class
+	CMS_HOOK_RESPONSE_ALTER
+
+inherit
+	CMS_HOOK
+
+feature -- Hook
+
+	response_alter (a_response: CMS_RESPONSE)
+		deferred
+		end
+
+note
+	copyright: "2011-2015, Jocelyn Fiat, Javier Velilla, Eiffel Software and others"
+	license: "Eiffel Forum License v2 (see http://www.eiffel.com/licensing/forum.txt)"
+	source: "[
+			Eiffel Software
+			5949 Hollister Ave., Goleta, CA 93117 USA
+			Telephone 805-685-1006, Fax 805-685-6869
+			Website http://www.eiffel.com
+			Customer support http://support.eiffel.com
+		]"
+end