Renamed XMLPathTracker to PathTracker, since it can be used in other scenarios
Converted several BioSeq methods to static. Cleaned up tools.
Improved parser to allow mapping of regions when uniprot changed
Finished updating DisProt parser
Fixd bug when adding maps to regions. Removed filter for processing only one entry.
Added getter that gives a set of uniprot ids that are mapped from the DisProtEntry
Changed the return value of the mapped_uniprot_entries to list to improve JSON encoding compatibility.