* rules/bio/ngs/tools/gatk.rules:   - add picard.rules   - update VariantEval options; GenotypeConcordance has been moved to own walker, remove redundant -ST spec
* rules/bio/ngs/tools/gatk.rules:
  - add picard.rules
  - update VariantEval options; GenotypeConcordance has been moved to own walker, remove redundant -ST spec

percyfal/snakemakelib,percyfal/snakemakelib