add user and checkin models and migrations
begin the real README, delete rails default
remove homescreen controller, prepare for users and checkins controller
create users and checkins controllers + models
update nav bar with rails link_to
connect with google oauth and successfully ping API
create new user when login occurs via google oAuth
*store name and photo_src in sessions and db
*remove email attribute until later (diff api call)
*display info on logged-in homepage
reset the session on logout
wip
The Super merge\! :metal: