Removed Get-VMHost reference

Merged where clauses and removed Get-VMHost call. Issue #88
Removed Get-VM reference

Issue #88
Remove Get-VMHost reference

Issue #88
Remove Get-Datastore reference

Issue #88
Removed Get-VM reference

Issue #88
Removed Get-Cluster reference

Issue #88
Removed Get-VMHost reference

Partial fix for Issue #88 - Still another Get-Datastore reference to remove.
Merge pull request #96 from Sneddo/issue-88

Partial fix for Issue #88