Add a storage key comparison algorithm

[recvfrom]

This PR adds and exports an algorithm for comparing two storage keys. This will be useful for non-storage APIs that want to partition state using storage keys.

Also, adding my name to the 'Acknowledgments' section since I forgot to do this with my previous PR. :D

Fixes #133

I don't think tests or implementation bugs are needed for this change since this PR doesn't change any existing functionality.

• [x] At least two implementers are interested (and none opposed):
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• [ ] Tests are written and can be reviewed and commented upon at:
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• [ ] Implementation bugs are filed:
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  • Firefox: Not required
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[recvfrom]

Thanks for the review @annevk, all changes should now be addressed

[annevk]

Thank you!