small usability updates for the exit object
Quick and dirty fix to make WebArena work in new versions of socket.io.
Proper namespaces need to be put into place.
Merge branch 'develop' into feature/ResponsivePositioning

* develop:
  Quick and dirty fix to make WebArena work in new versions of socket.io. Proper namespaces need to be put into place.
  small usability updates for the exit object
Fixed Arrow hiding and showing when switching between modes.