Add a tool for running the test cases in jmespath.test
Add a tool for running the test cases in jmespath.test

We should probably bring jmespath.test (https://github.com/jmespath/jmespath.test) in as a submodule and wire this up somehow, but for the time being it's sufficient to have this code to run until all expressions parse correctly (evaluate is a completely different matter, but eventually we'll get there too).

burtcorp/jmespath-java