illumina2cluster/build_illumina_analysis_dir.py: allow multiple fastq files per sample, and explicit specification of directory names other than "Unaligned" for fastq.gz files.
illumina2cluster/build_illumina_analysis_dir.py: allow multiple fastq files per sample, and explicit specification of directory names other than "Unaligned" for fastq.gz files.

fw1121/genomics,fw1121/genomics,fw1121/genomics,fw1121/genomics,fw1121/genomics