iPad Login App Using Navigation Controller

Registration verifies information (user confirms password, must enter
password and username). Login works via Kinvey & goes to a blank table
view controller w/working logout button.
Added main content page

Main content page added, which pulls list of courses from Kinvey
"Courses" collection.
Update README.md
Update README.md
Ignore "UserInterfaceState.xcuserstate"

Ignore the project's UserInterfaceState.xcuserstate file. Attempting to
get Xcode to commit/push [gitignore should enforce excluding this file].
.gitignore

.gitignore file for ignoring "UserInterfaceState.xcuserstate"
Another DSStore file