Implemented custom cms format, and associated administration pages.

Applied to existing filter and format.
Added embedded_video filter (initially contribute by Javier Velilla).

modules/embedded_video/src/video_html_content_format.e

@@ -0,0 +1,34 @@
+note
+	description: "Summary description for {VIDEO_HTML_CONTENT_FORMAT}."
+	author: ""
+	date: "$Date: 2015-07-10 13:38:10 +0200 (ven., 10 juil. 2015) $"
+	revision: "$Revision: 97687 $"
+
+class
+	VIDEO_HTML_CONTENT_FORMAT
+
+inherit
+
+	CONTENT_FORMAT
+		redefine
+			default_create
+		end
+
+feature {NONE} -- Initialization
+
+	default_create
+		do
+			Precursor
+			create filters.make (0)
+			filters.force (create {VIDEO_CONTENT_FILTER})
+		end
+
+feature -- Access
+
+	name: STRING = "video_html"
+
+	title: STRING_8 = "Video HTML content"
+
+	filters: ARRAYED_LIST [CONTENT_FILTER]
+
+end