added: TextStream a class similar to std::ostringstream

but with a Clear() method
       the dynamic allocated buffer can be easily reused
added: DbTextStream a special version of a stream
       used to create a database string query
       everything is escaped by default
added: DbBase a base class with some basic methods for communicating
       with the database
added: DbConn a class for managing connection to the database
changed: some refactoring in Db class       



git-svn-id: svn://ttmath.org/publicrep/winix/trunk@655 e52654a7-88a9-db11-a3e9-0013d4bc506e

core/app.h

@@ -25,7 +25,7 @@
 #include "request.h"
 #include "sessionmanager.h"
 #include "notify.h"
-#include "db.h"
+#include "db/db.h"
 #include "functions/functions.h"
 #include "templates/templates.h"
 #include "templatesnotify/templatesnotify.h"
@@ -67,7 +67,7 @@ public:
 
 	// database
 	Db db;
-
+	DbConn db_conn;