This patch teaches doclint to regenerate table of contents
automatically whenever it's needed.
This patch:
- splits lint.js into lint.js and cli.js
- teaches cli.js to generate table-of-contents
- removes the test for table-of-contents errors from doclint
- adds a test for doclint failing to parse object destructuring in
method parameters.
This patch adds a 'visible' option to the Page.waitFor method, making
it possible to wait for the element to become actually visible.
References #89, #91.
