Unit tests

[jacobwilliams]

Need some rigorous unit tests.

[zbeekman]

First let me start by saying I'm a big fan of any and all software testing. Unit tests are great.

I just want to point out that there is a decent testing capability and automated framework using the test/sample code @jacobwilliams wrote along with output validation using jsonlint (see #26) that is automated in the CMake build system. The tests, while perhaps somewhat ad hoc, have good coverage and test that the code behaves as expected, on a coarse level, and tests for regressions.

I am posting this because I want people to know that it is at least moderately well tested code as is, even without more fine grained unit testing.