Allow to login with username or email.

Removed useless and unimplemented feature from CMS_FORM .
SCOOP is default for demo.ecf
Made blog and page module self administrable, i.e administration module is same as module.
This fixes the export hook for page and blog modules.
Improved sql instructions to ease debugging and catch missing sql_finalize... call.
Cleaned sql code.

library/persistence/sqlite3/src/cms_storage_sqlite3.e

@@ -73,14 +73,25 @@ feature -- Execution
 
 	sql_begin_transaction
 			-- Start a database transtaction.
+		local
+			retried: BOOLEAN
 		do
-			if transaction_depth = 0 then
-				sqlite.begin_transaction (False)
-			end
-			transaction_depth := transaction_depth + 1
-			debug ("roc_storage")
-				print ("# sql_begin_transaction (depth="+ transaction_depth.out +").%N")
+			if retried then
+					-- Issue .. db locked?
+				sql_rollback_transaction
+				error_handler.add_custom_error (-1, "db error", "Unable to begin transaction..")
+			else
+				if transaction_depth = 0 then
+					sqlite.begin_transaction (False)
+				end
+				transaction_depth := transaction_depth + 1
+				debug ("roc_storage")
+					print ("# sql_begin_transaction (depth="+ transaction_depth.out +").%N")
+				end
 			end
+		rescue
+			retried := True
+			retry
 		end
 
 	sql_rollback_transaction