added closure for fastq parsing, pre-casava-1.8 pair check
added closure for fastq parsing, pre-casava-1.8 pair check

senthil10/scilifelab,kate-v-stepanova/scilifelab,kate-v-stepanova/scilifelab,kate-v-stepanova/scilifelab,SciLifeLab/scilifelab,jun-wan/scilifelab,kate-v-stepanova/scilifelab,jun-wan/scilifelab,jun-wan/scilifelab,senthil10/scilifelab,jun-wan/scilifelab,senthil10/scilifelab,senthil10/scilifelab,SciLifeLab/scilifelab,SciLifeLab/scilifelab,SciLifeLab/scilifelab