Added CMS_API.request: WSF_REQUEST to ease dev of ROC CMS code.

- Removed CMS_REQUEST_UTIL
  - centralize a few request related code into CMS_API
Added CMS_API.user, CMS_API.set_user (CMS_USER), ... and user related routines.

Refactored Auth related code
  - added various abstractions to factorize implementation and harmonize solutions.
  - revisited the logout strategy.
  - updated the account info page, and remove info user should not care about.
  - simplified the process, and encourage auth module to follow same design.

Added CMS_LINK helper routines to modify the related query string.
Removed CMS_USER.profile (and related routines)
   - It was not used so far.
   - it will probably a specific module later, if needed.

Update various module to avoid fetching user from sql directly, and let this task to CMS_USER_API.

Removed CMS_NODE_API.node_author (a_node: CMS_NODE): detachable CMS_USER,
   - as the info is already in CMS_NODE.author

Added CMS_RESPONSE.redirection_delay, if ever one code want to redirect after a few seconds.
Added the request uri info to the not found cms response.

modules/node/persistence/cms_node_storage_null.e

@@ -75,17 +75,6 @@ feature -- Access: node
 		do
 		end
 
-	node_author (a_node: CMS_NODE): detachable CMS_USER
-			-- Node's author. if any.
-		do
-		end
-
-	node_collaborators (a_id: like {CMS_NODE}.id): LIST [CMS_USER]
-			-- Possible list of node's collaborator.
-		do
-			create {ARRAYED_LIST [CMS_USER]} Result.make (0)
-		end
-
 feature -- Access: outline		
 
 	children (a_node: CMS_NODE): detachable LIST [CMS_NODE]