Accept messages after the state indicator for notification purposes

Allows users to send notifications via the CLI and TCP interfaces that are displayed using the Notification API. E.g.:

```
> echo 2 test succeeded | nc localhost 17357
 - or -
> stopplicht green test succeeded
```
![screen shot 2014-10-31 at 10 18 42 am](https://cloud.githubusercontent.com/assets/251722/4863010/3b30e254-6111-11e4-8362-7c460e6c80db.png)

I expect the most powerful use case to be displaying a useful message indicating tests which may have failed or other error messages.