Nonblocking Workflow With Issue Generation Preview

This is a pre-release which adds swimm-verify-nonblocking as an optional hook. With minimal configuration, you can allow verification failures to proceed by kicking off an issue with context of the failure right from the commit script.

Requires curl, wget and something like Zapier to receive the ping and actually open the issue.

Contains functionality to download the CLI executable on-the-fly which will be enabled in the next release.