Normalize-by-median.py script as a module

[zmunro]

The normalize-by-median.py script (under /scripts) would be very useful as a module. I want to be able to do something like:

import khmer

khmer.normalize_by_median(input=fastqgz_filepath, output=output_fastqgz)

Is something like this already possible?

[standage]

This has been a pain point for...a while. See #389 (comment). This was planned for khmer (to be renamed as oxli) version 3.0, which unfortunately never really materialized. I don't anticipate that this will be supported, at least any time soon. I've heard hints that khmer/oxli may be rebooted soon.