Add support for excluding fastq files

[rernst]

Use cases:

• When a sample does not pass QC we should be able to exclude it from the analysis, including possible father / mother samples.
• When a sample from another project is merged we should be able exclude all other samples from the same project.

Possible solutions:

• Use a samplesheet like form / document
• Improve / rewrite run_nextflow_wes.sh to support these use cases.