[Ovmsdev] DIAG mode Perl clients

I've added two DIAG mode Perl clients to the repository: https://github.com/openvehicles/Open-Vehicle-Monitoring-System/commit/91cf3d... Both have not yet been tested on a Windows system, please report if you do so. Regards, Michael -- Michael Balzer * Helkenberger Weg 9 * D-58256 Ennepetal Fon 02333 / 833 5735 * Handy 0176 / 206 989 26