Feature/50 test framework

[kaievns]

So, this pretty chunky thing closes several issues

1. Update test framework - replace Tape with Mocha #50 replaces tape with mocha
2. Change assert statements in tests to use Must #63 changes all assertions to use must consistently with the should syntax
3. Test files should have _test suffix #41 makes all test files automatically have the _test suffix
4. Generated project structure #45 + Naming convention of things #2 renames the tests/ -> test/
5. adds the test/mocha.opts file as a standard way to configure mocha within projects
6. makes tests awesome again

[nwinch]

Do we need to align assignments? This is probably one of "those" conversations, but we haven't done that on any other projects so to be safe I think let's not introduce the style here, but let's discuss it.

[kaievns]

Ah, sorry my bad. I normally align things in my projects, must have done this accidentally here. Will put this back

[nwinch]

@madrabbit Review done with just a couple of minor things. Lovely stuff. LGTM 👍