Added rule description URLs to the rules that have corresponding pages so they can be used in formatters

The URLs are still valid.

Any issues with merging this?

@XhmikosR Can you triage this?

@sergeychernyshev: can you squash the patches?

@XhmikosR never did that with code already pushed to GitHub.

Can you give me some pointers at what you're looking to get and how to do that?

@sergeychernyshev I like this article https://github.com/edx/edx-platform/wiki/How-to-Rebase-a-Pull-Request. Maybe that helps.

rebase -i HEAD3 or rebase -i HEAD4 (one of those two should be OK)

and then force push.

@XhmikosR @ideadapt @frvge done - squashed and force-pushed so pull request is updated now.