> Get boot2docker working with nfs instead of vboxsf.

Tested on:

```
Boot2Docker-cli version: v1.6.0
Git commit: 9894ae9
```

In your Mac, open the file `/etc/nfs.conf` and add this line:

```
nfs.server.mount.require_resv_port = 0
```

Then, open `/etc/exports` and add this line, changing the values to match your case:

```
/Users/<your username> -mapall=<your username>:staff <mac's ip address>
```

With both files changed time to apply the new settings:

```
sudo nfsd restart
```

Finally, ssh into your boot2docker machine and run:

```
sudo umount /Users
sudo mkdir /Users/<your username>
sudo /usr/local/etc/init.d/nfs-client start
sudo mount <mac's ip address>:/Users/<your username> /Users/<your username> -o rw,async,noatime
```

You'll notice I'm mounting an especific user's directory instead of the `Users` directory itself, that's because of permissions, I couldn't share the `Users` directory on my behalf.