Simple tutorial application 309

Fixes #309 
And in fact I do have ssh-agent, but this claims it's not running:

```
$ kill -0 ${SSH_AGENT_PID} && echo "ssh-agent running" || "ssh-agent not running"
kill: usage: kill [-s sigspec | -n signum | -sigspec] pid | jobspec ... or kill -l [sigspec]
ssh-agent not running: command not found
```