Modificando hostname para testar no Synchro
Modifying vboxmanage to VBoxManage
vboxmanage occurrences replaced for VBoxManage, which is the correct command name and works in all distributions.

The all-lowercase command is just an alias in Debian-like systems, and only to VirtualBox OSE.

Using the VBoxManage spelling works on all systems and with the Oracle proprietary VirtualBox.
Removed ssh4py in favor of using direct OS commands. I know this isn't ideal for a number of reasons, but ssh4py can be a hard dep to come by on some OSes. Also added half-implemented threading.
Merge pull request #1 from estomagado/working

Estomagado solved an issue with VBoxManage command name on some distros.