Fixed persistency layer.

Now we have ODBC .. that accepts various connection string (including SQLite, MySQL,...)
  And EiffelStore+MySQL.
Updated sql scripts to work with MySQL, and SQLite.
Added a sql_statement (s: STRING): STRING that converts ROC sql statement to fit the underlying database engine.
 mostly to adapt incompatibilities such as AUTO_INCREMENT for MySQL and AUTOINCREMENT for SQLite
 by default SQL script should be written following MySQL SQL syntax.
Warning: to use ODBC persistence driver, it has to be installed on the target machine.

library/persistence/store_odbc/tests/application.e

@@ -0,0 +1,29 @@
+note
+	description : "tests application root class"
+	date        : "$Date: 2015-01-27 19:15:02 +0100 (mar., 27 janv. 2015) $"
+	revision    : "$Revision: 96542 $"
+
+class
+	APPLICATION
+
+inherit
+	ARGUMENTS
+
+create
+	make
+
+feature {NONE} -- Initialization
+
+	make
+			-- Run application.
+		local
+			storage: CMS_STORAGE_SQLITE
+		do
+			-- Change the path.
+			create connection.login_with_connection_string ("Driver=SQLite3 ODBC Driver;Database=./cms_lite.db;LongNames=0;Timeout=1000;NoTXN=0;SyncPragma=NORMAL;StepAPI=0;")
+			create storage.make (connection)
+		end
+
+	connection: DATABASE_CONNECTION_ODBC
+
+end