2-color Baltimore Node logo (Unicorn and EggBot)

To go with the new multiple-color plotting functionality of my Unicorn G-Code Output extension for Inkscape, here's a new version of the Baltimore Node logo.

This one is ready to plot in 2 layers - all of the black parts at once, followed by all of the blue ones, with a pause at the beginning of each layer to allow a pen change.

I also made use of my Hershey Fonts in SVG to make the word "baltimore" more readable after plotting. This should make it look nice, for example, on an EggBot.