Make sure the TF discussion links in the README resolve correctly

Hey Zack,

I *finally* got around to watching your talk on WPSessions and noticed that the links to the two important discussions you mentioned were broken in the readme because they don't contain a protocol. Currently if you click a link to either of those discussions from the readme on Github you'll end up going to [this](https://github.com/tollmanz/backbone-wordpress-theme/blob/master/thethemefoundry.com/blog/backbone-js-routers-collections) or [this](https://github.com/tollmanz/backbone-wordpress-theme/blob/master/thethemefoundry.com/blog/backbone-js-collections-plugin-compatibility) so this PR will fix that.

Also, massive props for your "Backbone.js WordPress Theme Bill of Rights" as well. I've been working on a few Backbone things internally but after hearing your bill of rights I've had to rethink some of my decisions which is awesome! :cake: