Allele depth

[egor-dolzhenko]

This pull request will:

• Introduce allele depth calculation
• Move more code to the Core component
• Rename visualizeLocus workflow to analyzeLocus (since this workflow now also outputs metrics)

The output of allele depth calculation is a TSV file. Here is an example:

VariantId       AlleleDepths
BEAN1_chr16:66490398-66490458   0.00/0.40
BEAN1_chr16:66490399-66490453   18.93/20.24

[egor-dolzhenko]

Thanks for review!