FASTP to replace trimmomatic, picard and fastqc. Also handles gzipped input

[DennisSchmitz]

@dnieuw showed fastp, a new preprocessing tool, see paper and code.

It might be able, in a single process, to eliminate the usage of trimmomatic, picard and fastqc. It handles all these functions into one process. Furthermore, it is compatible with MultiQC and it automatically accepts gzipped input files (and even outputs as gzipped files).

Should try it out, would speed up and simplify the pipeline greatly. Furthermore, it gives greater control over pre-processing and should play more nicely with Snakemake's DAG.

[DennisSchmitz]

Something to keep in mind for later, but the current setup works so there is no need to replace it anymore.