Removed obsolete calls, harmonized predefine response, added non admin user pages.

When access is denied, also provide when possible and wanted, the needed
permissions so that in the future, user will be able to ask for
permission easily.
Renamed previous user handlers as admin user handlers.
Added non admin user handler /user/{uid} .
Add new `send_...` response to `CMS_API.response_api`, and use them
instead of `create {...RESPONSE}.... ; execute`.
Fixed potential issue with storage mailer initialization if folder does
not exist.
Added utf_8_encoded helpers function on CMS_API interface.
Fixed a few unicode potential issues.
Removed a few obsolete calls.

library/model/src/user/cms_user.e

@@ -17,15 +17,19 @@ create
 
 feature {NONE} -- Initialization
 
-	make (a_name: READABLE_STRING_32)
+	make (a_name: READABLE_STRING_GENERAL)
 			-- Create an object with name `a_name'.
 		require
 			a_name_not_empty: not a_name.is_whitespace
 		do
-			name := a_name
+			if attached {READABLE_STRING_32} a_name as n32 then
+				name := n32
+			else
+				name := a_name.to_string_32
+			end
 			initialize
 		ensure
-			name_set: name = a_name
+			name_set: name.same_string_general (a_name)
 			status_not_active: status = not_active
 		end