* Add htmlproofer to verify links
Partially addresses #247
* Make htmlproofer a Rake task
* Verify that we don't have leftover Markdown links
* Don't build the full Ruby Sass docs before running htmlproofer
* Don't check generated documentation
* Fix a few more broken links
* Add another URL exception
* Limit which branches we run tests for
* Add more URL exceptions
The high-level goal of this rewrite is to make it easier to contribute.
It focuses less on requirements, especially for tweaks that can easily
be added by Chris and I after the fact, and more on familiarizing
potential contributors with what to do and how to get help with it.
The "Stable" section under "Contribute" had a typo in the following sentence:
"If you have a some code to contribute, fork the stable branch and send us a pull request."
It should read:
"If you have some code to contribute, fork the stable branch and send us a pull request."