Added Rubinius v2.2.3 to cover Travis CI compatability issues, fixes #74.
Added 2.1.0 to build matrix
Merge pull request #75 from sgerrand/rbx-fix-psych-load

Update Rubinius and MRI versions for compatibility with Travis CI
Add OAuth support based on configuration passed
Added store_information to API methods
Revert product API to default rest call instead of resource