Investigate whether we can do a there and back plot

[TriggerAu]

for travel and return Travel out Period of Stay Travel back

[TriggerAu]

Got a bunch of this worked out, but the way to visualise it is killing me - its basically a transfer plot Cube, and how the heck I can draw this and allow selection is getting hard to work out

[wcmille]

If you specify a min/max length of stay, maybe you can just show delta-v versus return-to-start date?

[wcmille]

Also may wAnt to include costs of setting inclination of destination parking orbit.

[TriggerAu]

I like that idea is good. I've had to put this work on hold at the moment while I do some squad stuff, but will get back to it