Added a "guide" for the GUI team

Basically made it so we have a path to follow in the code. It's easy to
get lost, so I tell you where to go (it took a while to figure it
out!)...and by you I mean danielle and myself (other teams take a
different route)
Merge branch 'r2' of https://github.com/pbuttler/SE362-Unit-2-HTML into r2