Buffered Ports 

Re-issue of pull request https://github.com/planthaber/rock-webapp/pull/11 against master
I don't see what you mean

```ruby
                    def dead?
                        if !reader_or_writer.connected?
                            @lifetime_s = 0
                            return false
                        end
                        true
                    end
```
 looks quite the same

the connected? call is from the writer object of the port implementation, not of the PortEntry class