Fix a typo
Add 'host.get' method for retrieving properties of a single HostSystem managed object
Add 'datacenter.get' method for retrieving properties for a single
Datacenter managed object
Add 'cluster.get' method for retrieving properties of a single
ClusterComputeResource managed object
Add 'resource.pool.get' method for retrieving properties of a single
ResourcePool managed object
Add 'datastore.get' method for retrieving properties of a single
Datastore managed object