(feat) Add links to example repos.

@reem, what do you think of this? I liked @mk270's idea, and he's already started building out an examples repo.

I commented out a potential examples section.

Importantly, though, this links to the docs' server code, as requested in https://github.com/iron/iron-doc/issues/8. I need to update that code today as well (and refresh the outdated docs).