Setup test framework

[acrosman]

Summary
Current the project has no automated testing – it should.

Describe the solution you'd like
I would like to have an automated test framework that works well with electron and can eventually be supported by CircleCI when I get around to setting that up. I have used Mocha and Chai a very little bit on other projects so would default there, but have no strong opinion if you know another framework that might serve the project better.

[SerhatKayaa]

i'd want to work on this :)

[acrosman]

Go for it