Adding more spacecrafts and produce GIF animation #14

The mentioned ACE and Wind I usually omit because they would overlap with 'Earth'. But you can already now replace 'Earth' with 'Wind', which then will be plotted instead (doesn't work in the web-app, though).

Cf. also #8

About the GIF animation, one could quite easily achieve that by modifying my example from the PyHC summer school notebook (under 5.1 Loop over multiple datetimes (plots)).

One could of course write this as a new function of solarmach. But because this is quite a specific task that already has some kind of workaround, I think for me it has a rather low priority. But that shouldn't stop anyone else to write such a short function! 😉 I'd be glad to help!

I've checked the example in the summer school notebook, and for some reason the imageio doesn't work. I'll try to see alternative options. Many thanks! :)