Ultrasonic Ranger arrives (SRF04) - good test!

Constructed a 4 wire Molex connector .. my first crimp job and use of connectors .. so that's how they build those things ... neat.

Tested using the oSonarDV object. Seems to work but it was awkward trying to read range using DeBug while moving the Ranger around .. need to spend more time calibrating .. will set it aside till I get a bot that moves.