Add a ported example configuration for the Velleman K8400 (Vertex) printer.
Supports both dual and single head printers (with the correct config).
Includes community sourced feed rate fix.
Rename / move files.
Remove redundant definitions.
Includes:
*firmware version / branch / date.
*extruder count
*board information (name, serial details, power supply type)
*thermistors (names, min/max temperatures)
*printer statistics (PRINTCOUNTER details)
Thanks to @thinkyhead for contributions.