[D-Rose-ann] Release 0.03.00

[David J. <dj...@gm...>]

This version adds a Rail Editor, accessible by right clicking on a
rail line on the map. The Rail Editor lets you configure tracks and
crossovers on a rail line.

While the Rail Editor is about where I think it should be for this
release, it's not connected to anything else. In particular, trains
still run through each other, ghost-like, but now that you can add
sidings, etc., we'll be doing a simple dispatcher and collision
detection before the next stable release.

Enjoy,
Dave