KSpace module needs tests, consolidation, better docs, examples

[Eric Harper]

1. Create tests (see #148 for a bug that tests should prevent).
2. Consolidate kspace.pxi and kspace.py files.
3. Improve documentation and clarify units (nm for scale?).
4. Make examples.

[M. Eric Irrgang]

Whoops! I never saw this. If I can be of help, let me know.

[Bradley Dice]

Thanks, @m_eric_irrgang! I am a new co-maintainer for freud along with @vramasub and we're cleaning up old issues. We are going through open issues and comparing them to the current state of the code to figure out what should be resolved/closed. If you have any status updates on this or other issues, unfinished code to contribute, etc., please let us know! :)

[M. Eric Irrgang]

I do not have any updates. If there are specific questions about past contributions, though, I can try to answer them.

[Vyas Ramasubramani]

Were there specific bugs or issues that this was trying to address? As I read it, this issue basically applies to all of freud in general: clean it up, add more tests of correctness. Does that sound right to you?

[Bradley Dice]

We want all modules to be tested in 1.0, this is related to #166. Also we should copy-paste all the functions in kspace.py into kspace.pxi for consistency.

[Vyas Ramasubramani]

The proposals for updating the project are fully documented in Issue #184.