Representation of genomic-loci ranges that may be used to instantiate a org.hammerlab.genomics.loci.set.LociSet.
Constituent ranges can be open-ended, so a ParsedLoci is typically a short-lived intermediate representation
between String representations of ranges (possibly originating from cmdline-flags or a file) and a
org.hammerlab.genomics.loci.set.LociSet whose open-ended ranges have been "resolved" using contig-length
information found in a BAM header.
The two implementations are:
Representation of a genomic range as parsed from a cmdline-flag or file.
Special ParsedLoci value representing all genomic loci.