Feature/genotype

[buehlere]

PR checklist

Closes #28 and partly closes #39

• adding genotype variant module.
• If you've fixed a bug or added code that should be tested, add tests!
• If you've added a new tool - have you followed the module conventions in the contribution docs
• If necessary, include test data in your PR.
• Remove all TODO statements.
• Emit the versions.yml file.
• Follow the naming conventions.
• Follow the parameters requirements.
• Follow the input/output options guidelines.
• Add a resource label
• Use BioConda and BioContainers if possible to fulfil software requirements.
• Ensure that the test works with either Docker / Singularity. Conda CI tests can be quite flaky:
  • nf-test test --profile=docker --tag
  • nf-test test --profile=singularity --tag
  • nf-test test --profile=conda --tag (As of now not planning to support conda)

[johnoooh]

We should talk about test_data tomorrow at our meeting to get some consistency across some of our modules or have a main branch we work off of in test dataset. In n-f core they have the main modules branch and branches for each pipeline.

[buehlere]

good call, referencing: #26