Replace all should assertions with express.
I wrote a few more tests, to get this thing rolling. The should library
should.not.be used anywhere on the browser. It fucks with global
properties. It would not properly do `should.not.exist(null)` It kept
saying the window object wasn't equal to null. Which is true, but not at
all what I was trying to check. I suggested the chai team reopen a
ticket that dealt with this problem. I don't think they fixed for use
within require.