refactoring is mainly complete just have to work on getting a couple conditionals working.
changed the workflow installation to be more generic - to be with other workflows as well
made changes for parameterizing workflow installation
merging feature branch with develop
Delete undesired cghub https://cghub.ucsc.edu/software/downloads/cghub_public.key
Change string to boolean 

This allows swap_on to default to false
Made it so that multiple workflows can be specified by bindle
cleaning up vars for workflow role
fixed a couple little bugs
Add documentation for f500
Merge pull request #3 from ICGC-TCGA-PanCancer/feature/ajw-workflow-parameterize

Feature/ajw workflow parameterize