new avatar images

A big thank you to the talented Nadya Sivers from Ukraine who drew a new set of cyber-dojo avatar images. Watch out for even more avatars once cyber-dojo has been refactored to support scaling.

cyber-dojo now supports vhdl

A big thank you to Pablo Mansanet from the excellent Bluefruit software in Cornwall, UK, who just added VHDL (VHSIC Hardware Description Language) to cyber-dojo :-)