Add support for LinkSeq XML

Referenced here.

XML Sections to parse

It looks like the XML has an labAssignmentSection block at the top which includes the assigned typings. These can be read and passed to a ValidationModelBuilder to populate the core typing data.

For haplotype information, there is a testResultsSection that has all the possible alleles for each locus, which will be used to populate haplotype information.

Implementation Notes

• You can use the Score6 XML parser as a reference for how to read the desired XML sections.
• For reference, the XML parsing is done with JSoup. You're given the Document, so building the parser is all about finding the appropriate XML Elements, getting their text contents, and passing them appropriately to the builder.

Goals

• Assigned typing parsing works
• Haplotype parsing works