Running Nextflow Data Pipelines on Azure Batch

jermth great work pushing this through.  Its great to see Azure listed in the documentation for Nextflow..

A couple tips for anyone trying to run this:
1.  your Azure Batch account should be setup in Batch Pool Allocation mode, which carries a Batch quota separate from your subscription
2.  I could not download the correct edge version as shown in the Nextflow docs....I was able to install it using this variable instead:  `export NXF_VER=21.02.0-edge`

3.  A working `nextflow.config` sample file is here that includes an autoscaled Batch autopool