Update fastqc_per_base_sequence_quality_dropoff.py

[ksilnoaa]

Update fastqc_per_base_sequence_quality_dropoff.py to work with fastq_summary.qzv output

[lukenoaa]

I agree it would be great if this script can work directly from QIIME output without running FastQC/MultiQC. The zip archive of fastq_summary.qzv does contain forward-seven-number-summaries.tsv and reverse-seven-number-summaries.tsv that contain the distribution of quality scores at each position. For example, we could have the script report at which position the 9th percentile drops below a quality score of 20.

[ksilnoaa]

@lukenoaa yes that's what I was thinking! Would you be able to adapt that script for that functionality? Then I can include it in the V2 workflow.