Updating the readme file

@darbyfrey 

I made quite a few changes here, and did my best to clean up some of your instructions. If you don't mind please read through this again, it could likely be cleaned up a little more. I tried to make the directions more direct but at the same time I could have added some incorrect terminology and such.

On Monday we can sync up on the exercises, get the codebase in it's final state, and then put all of the slides together. Overall we'll make it!

Have a good weekend man!