Server stop command for the command-line tool

It's ugly as hell, but I'm just shooting for that 0.1.0
Simple server status indicator
Simple server stats command.
Move the messaging stuff into a different file.
Test fixing
Don't use backticks

This avoids a problem where another program or user might put something
nefarious in the pid file. For example:
```bash
1234; rm -rf /
```
Service search for command-line tool.