Running Asp.NET vNext on a Mac

I am preparing for a talk I am about to give very soon (more to follow), and I wanted to demo some of the new features of ASP.NET MVC 6 on a Mac. It took reading instructions on multiple sites to get this to work, so I wanted to write it down in one place. Hopefully, this can help someone save a little bit of time. The only thing that is assumed [...]