Python bindings bug and update

[knmcguire]

The spiral and updated go_to PR (#1410) caused compatibility issues with the Crazyswarm2 with the python bindings.

See this issue: IMRCLab/crazyswarm2#587

We need to update the plan_to function in the python bindings and add the spiral function itself.

Also let's keep an eye on this PR too: #1377. This will also cause incompatibility with Crazyswarm2... maybe it is better to first merge this and then fix both issues together.

[knmcguire]

@matejkarasek just letting you know about this. I was half working on this already for ROSCon but haven't gotten the time to finish it.

[matejkarasek]

Thanks for heads up, and my apologies... Unfortunately I have zero experience with Python bindings and by quickly looking into the code I could not find the pieces of code that need to be updated.
Will keep an eye on this issue to learn and see if I can help resolve it...

[knmcguire]

No problem. The current plan is to first merge #1377 and fix the bindings in one PR after that.