Add shuttle-parking_lot

[sarsko]

Adds Shuttle support for the parking_lot library

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By submitting this pull request, I confirm that my contribution is made under the terms of the Apache 2.0 license.

[jorajeev]

This should be "0.12.5" right?

[sarsko]

Debatable, I think no.

In my head releasing version mirrors is independent from the code. Thus all wrappers will be pushed as 0.0.1, because this is a releasable non-colliding version for all the packages, meaning we can release it and depend on it without there being any confusion on what version its wrapping. We can also yank a version 0.0.1 that was released (accidentally or not) without any loss. It is thus "safe" to have version 0.0.1. Version "0.12.5" however has a version collision, and publishing it is a final action. It is not "safe" to have version 0.12.5.

Regardless of what we release, I think the crates should live in the repo as 0.0.1s

[jorajeev]

Should be 0.8 no?

[sarsko]

Same as the comment on the parking lot version

[sarsko]

The original plan was to use #233 to resolve the issue with poisoned locks. Upon further investigation this does not work, and we need to expose a lock which doesn't poison from Shuttle. Put up an issue here #237

[sarsko]

All comments should be addressed