Consistency with printDebts for FedDatacenter
Adding VmTyped class
Fixing bug for supporting both Vm and VmTyped
Creating typed vms in VmFactory and bug fixing in CostComputer
clarify the comment for the DatacenterGenerator class
Minor modifications
Merge branch 'master' of http://git.hpc.isti.cnr.it/carlini/smartfed
Metascheduler: more robust findProviderById method
Adding basic experiment