This commit make several changes at CLEVER. Now CLEVER: 
-Can create Virtual Machine with Hard Disk image Exclusive or Clonable
-Has changed his concept of Virtual Machine registration, the operation registervm is used to register the template of the VM on CLEVER
-Have a syncronization algoritm that, when an host manager notify is presence, aligns  CLEVER VM hosted information with  the host's hypervisor state
-The ListVm operation has been adjusted to allow you to see both the vm known to CLEVER that the vm known to the hypervisor.

We have also:
-eliminated some interprocess communication problems, 
-solved problems caused by the VM cancellation on sedna, 
-adjusted the hypervisor plugin to make sure that it is possible to use the same  VEDescriptor both Libvirt and VirtualBox