Setup rake task to generate quicktest html files.

There are two rake tasks that generate html for quick tests.

`rake tests:generate_all` will generate all quick tests defined in `quicktests/list_of_quicktests.json`

`rake tests:generate_html name="add_time"` will generate a quick test file for a given test name.

To run these, you'll need to make sure required gems are installed. You can do that by running:

`gem install rake json`