Problem: No automated way to generate Ruby bindings
Solution: Add zproject_bindings_ruby.gsl
Problem: No documentation for API models and language bindings
Solution: Add a basic example and documentation suitable enough for now

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extra : amend_source : e0f1d4eb302820c2603ff8f8840014d10572741f
Merge pull request #88 from jemc/master

Problem: No automated way to generate Ruby bindings