any mode is missing 5 prime adaptors

[jblachly]

When provided with 5 prime adaptors of the form (e.g.)

NNNNNGCTACCC

skewer finds and removes them efficiently in mode -m head. However, when running in -m any mode, they are not detected and removed.

[jblachly]

I noticed the total read counts after running in any mode are extremely low, so what is left over is the detritus of too general of an adapter to look for throughout the read.

That being said, there are still misses, but I think barcodes simply can't be run in -m any mode due to their length. This is my oversight.

It would be very nice if output could be piped to another stage (or even to another invocation of the program), because a typical workflow could be to remove barcodes (and/or demultiplex while removing), then to remove adapters.

Presently, this requires separate runs, and the way the files are named (with the automatic append of -trimmed) makes this somewhat painful.