Add debugging for process reaping
Prevent calls to dead actors during shutdown
Don't restart an app when it's being shut down
Rescue from more IO errors

Connection resets and timeouts were causing socket proxy to explode
Lock sys-proctable dependency to 0.9.1

Later versions of sys-proctable are causing hangs on several people's machines
due to an OSX-related bug.
Bump version to 1.1.5.pre0 for release