Bug fix: rake db:dump was showing nullable columns as not null and vice versa.
Added 169f.
Added db schema diagram for 169f.
Added sample username/passwords to login screen; showing login name on
left of header.
Added 169b and c.
Added 170f and 171f.
Hard-coded session secret instead of randomizing at each restart.
Added 170bc, 171bcf, 172bcf.
Merge branch 'master' of github.com:davincicoders/2013-q3-rails-1
Class work