Remove socket.io

We're not using socket.io notifications yet.  Remove them,
as they're causing problems with the Windows environment
passing through Apache.  We'll revisit them later when we
implement notifications.
Standardize navbar photo at 40px

This will scale smaller photos to be bigger, so the navbar
stays a fixed size.
Merge branch 'sprint8' into sprint8-ready-merge-task-show

* sprint8:
  Standardize navbar photo at 40px
  Remove socket.io