Add pycoverm

[apcamargo]

This PR adds the pycoverm Python library.

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[apcamargo]

@prototaxites @mbhall88 I ended up creating a separate PR to include a test.

@mbhall88 should we add # [build_platform != target_platform] to the additional build requirements?

[apcamargo]

@BiocondaBot please add label

[apcamargo]

@jakobnissen Not sure if this still helps you in any way, but this is finally in a working recipe.

[mbhall88]

Actually did you want to add @apcamargo and/or @prototaxites to the recipe maintainers?

[apcamargo]

I can be the maintainer. No problem.

Should we put # [build_platform != target_platform] in any other build requirement? I'm not familiar with this selector(?)

[daler]

FYI in general our policy is just simple existence checks (bioconda docs), but the bam seems small enough so this should be fine.