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/oauth20/cms_oauth_20_api.e

@@ -9,7 +9,7 @@ class
 	CMS_OAUTH_20_API
 
 inherit
-	CMS_MODULE_API
+	CMS_AUTH_API_I
 
 	REFACTORING_HELPER
 
@@ -97,7 +97,6 @@ feature -- Access: Consumers OAuth20
 
 feature	-- Change: User OAuth20
 
-
 	new_user_oauth2 (a_token: READABLE_STRING_GENERAL; a_user_profile: READABLE_STRING_32; a_user: CMS_USER; a_consumer: READABLE_STRING_GENERAL)
 			-- Add a new user with oauth20 using the consumer `a_consumer'.
 		require
@@ -124,6 +123,4 @@ feature	-- Change: User OAuth20
 			oauth_20_storage.remove_user_oauth2 (a_user, a_consumer_table)
 		end
 
-
-
 end