Update

This merge includes several updates including:

• preventing ulimit error on 256v1 nodes
• ignore dual indexed sequenign
• give access to param to add base mask (not accessible in Astrocyte)

PR checklist

• This comment contains a description of changes (with reason)
• If you've fixed a bug or added code that should be tested, add tests!
• Documentation in docs is updated
• CHANGELOG.md is updated
• README.md is updated
• LICENSE.md is updated with new contributors
• nextflow.config pipeline version updated

• Close issue
  Closes #37 (closed) Closes #38 (closed) Closes #39 (closed)

/cc @ghenry @venkat.malladi /assign @ghenry