Don't force username to root, rely on config.ssh.username
Merge pull request #31 from domcleal/ssh-user

Don't force username to root, rely on config.ssh.username
Fix NFS network discovery
Merge pull request #33 from domcleal/nfs-network

Fix NFS network discovery
* Image upload buffer length reduced.
* Error handling fixed to correspond to correct translation.
Updated Vagrantfile in example box.