installs devise gem, creates table for users, up till pg 170 of RIA (no ...

...modification of views)

basically it is on the way to adding users. it said in the readme that there's the ability to sign in, but that's not there, so I started to add it a bit. (shouldn't be too tough to continue that process if you want!) I basically worked right from chapt. 6 in the book, so hopefully it is clear what happened.