Connect and install commands

For your command line goodness, "connect" and "install" commands for Linux and OSX.

```
$ artoo connect
Commands:
  artoo connect bind            # bind [COMM] [ADDRESS] [NAME] binds a device to some connected hardware
  artoo connect help [COMMAND]  # Describe subcommands or one specific subcommand
  artoo connect scan            # scan for connected devices
  artoo connect socat           # socat [PORT] [NAME] use socat to connect a socket to a device by name
```

```
$ artoo install
Commands:
  artoo install help [COMMAND]  # Describe subcommands or one specific subcommand
  artoo install socat           # install socat utility program
```

These should make it a lot easier!