Towards a shared understanding of JSONPath

[cburgmer]

I'm collecting JSONPath implementations to show diverging implementations and help libraries to converge towards a similar interpretation of the original JSONPath post. You can see the current state of the comparison here: https://cburgmer.github.io/json-path-comparison/.

While most languages are already represented, Apple's own languages seem a bit harder to support and Objective C and Swift so far are missing.

I might find time to add this implementation to the comparison as well, for now I just wanted to share this with you here as this might already provide you with more test cases to align your implementation with.