Simplify name assigned by netkit to virtual machine
Create link to configuration directory.

Netkit driver generates a unique name for each virtual machine, so
we need to match each driver name with its node name so as to
configure the virtual machine
Add debug message
Remove netkit cow file if virtual machine crashed the first time it is executed
Rename index file to daemon
Fix typo error
Make several connection trials before destroying a virtual machine
Remove proper cow file using node name rather than driver name