Convert an Read into one or more SequenceRecords.
Convert an Read into one or more SequenceRecords. The reason that we can't simply use the "fromSpecificRecord" method, below, is that each Read can (through the fact that it could be a pair of reads) contain 1 or 2 possible SequenceRecord entries for the SequenceDictionary itself. Both have to be extracted, separately.
The Read from which to extract the SequenceRecord entries
a list of all SequenceRecord entries derivable from this record.