Add Unit Test Suite

[HopefulLlama]

I saw that one library but haven't thought much further than that.

http://www.thingiverse.com/thing:410831

[HopefulLlama]

After some initial (5 mins) investigation, the above library only unit tests functions, and does not unit test modules, which make up the bulk of JointSCAD.

[HopefulLlama]

Creating my own Unit Test suite. Watch this space...

[HopefulLlama]

Once I've resolved teething issues, I'll be looking into using https://github.com/HopefulLlama/UnitTestSCAD