Merge pull request #22 from MOARdV/master

Rewrite JSIOrbitDisplay::RenderOrbit to use existing utilities.
Merge pull request #23 from MOARdV/master

Add next maneuver node orbit render, Ap, Pe, and Node icons.
Action group memo can have 'on' and 'off'' versions.
Another policy nitpick
Consolidating icon code into it's own class.
I'm pretty sure that would be a bug.
Some policy compliance nitpicks.