Missing instructions on running local tests

[jenjiyi]

I believe the order of labs is off here if tests are required on this one. I followed instructions from the next lesson . When I type "Learn" in my terminal I get "This directory doesn't appear to have any specs in it." I'll raise an issue in that one if it persists.

I installed mocha and added in the missing node dependencies that are in the head of the index.html file and was able to view tests in my browser.
`<script src="node_modules/mocha/mocha.js"></script>

<script src="node_modules/expect/umd/expect.min.js"></script>`

I don't think installation was covered in the material so far or it should be added to the readme for this lab.

Then I submitted a pull request even though I can't complete the local test step.