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
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