rm infobar symlink
ensure msg in infobarStopper is right type

When embedded in other extensions, the infobarStopper request handler was responding to messages sent from outside extension code.
This caused a bug in Gombot where CompleteInfobar would have to be called twice to dismiss an infobar, meaning the user would have to enter the last digit of their PIN a second time.
Merge branch 'master' of github.com:psawaya/simulated_infobars into stopinfobar-fix
Merge pull request #6 from psawaya/master

rm symlink