* Addressing breaking changes in migration from Nim 0.18 to 0.19.
* Finishing the initial pass at the refactor required to include
docker-based builds.
* Regaining confidence in the existing functionality by getting all
tests passing again after docker introduction (still need new tests to
cover new docker functionality).
* Fixed the formatting of command line logging of strawboss workers.
* Fixed a bug in the (de)serialization of log levels in the strawboss service
config file.
* Pulled `parseBuildStatus` logic out of `loadBuildStatus` so that we could
parse a JSON that didn't come from a file.
* Added `parseRun` for Run objects.
* Moved `/ping` to `/service/debug/ping` for symmetry with
`/service/debug/stop`
* Added functional tests of full builds.
* Split the `test` nimble task into `unittest` and `functest`, with
corresponding test directories and test runners.
* Added documentation in README regarding building and testing StrawBoss.
* Created a small, simple test project for use in the functional tests.
* Added a `keepEnv` template in the server unit test code to make it easy to
preserve the working environment for a single unit test to invistigate
failures manually.
