Ticket #95 (closed enhancement: fixed)

Description

def EventMachine.run(*args)
  Thread.current[:eventmachine_main] = true
  super
end

def EventMachine.schedule(&job)
  if Thread.current[:eventmachine_main]
    job.call
  else
    next_tick &job
  end
end

Motivation - always kick stuff onto the EM thread, to avoid thread safety issues. We don't want locks because locks are slow.