Metadata output update

Cumulative update focused on metadata output:

• Add read length: both submitter entered and inferred (median length)
• Add calculated read counts: both raw and assigned
• Add median TIN
• Output multiqc json (for future use)
• Convert gene symbols to Entrez ID: for data-hub convenience (use version specific metadata - added to references)
• Create bash script to initiate parallel replicate runs from study RID
• Change consistence tests for assigned reads exact match to being within +/- 1/100,000 of expected

PR checklist

• This comment contains a description of changes (with reason)
• If you've fixed a bug or added code that should be tested, add tests!
• Documentation in docs is updated
• Replace dag.png with the most recent CI pipleine integrated_pe artifact
• CHANGELOG.md is updated
• README.md is updated
• LICENSE.md is updated with new contributors
• Docker images moved to production release and changed in pipeline
• Docker images used in the CI unit tests match those used in pipeline

• Close issue
  Closes #52 (closed) Closes #56 (closed)

/cc @ghenry @venkat.malladi

README.md

@@ -58,11 +58,17 @@ FULL EXAMPLE:
 nextflow run workflow/rna-seq.nf --deriva ./data/credential.json --bdbag ./data/cookies.txt --repRID Q-Y5JA
 ```
 
+To run a set of replicates from study RID:
+------------------------------------------
+Run in repo root dir:
+* `sh workflow/scripts/splitStudy.sh [studyRID]`
+It will run in parallel in batches of 5 replicatesRID
 
 
-[**CHANGELOG**](https://git.biohpc.swmed.edu/BICF/gudmap_rbk/rna-seq/blob/develop/CHANGELOG.md)
 
----
+<hr>
+[**CHANGELOG**](https://git.biohpc.swmed.edu/BICF/gudmap_rbk/rna-seq/blob/develop/CHANGELOG.md)
+<hr>
 
 Credits
 =======