References to Shippable were changed to Azure Pipelines.
Also remove rebalance.py as it does not work with Azure Pipelines due to the required data not being present.
* First attempt at making the shippable downloader recurse to pull parent results of reruns
Signed-off-by: Rick Elrod <rick@elrod.me>
* Update message for previous run download.
Co-authored-by: Matt Clay <matt@mystile.com>