Fixed minor issue where `get_resource_pool` threw an Exception when no resource pools were found that matched the given string name.
0.4.0
- Added resource pool parameter per 12 - fixed WaitForTasks hang issue - Added snapshot operations per 43 (thanks czee!)
0.3.0
Added new features: - power status 29 - powerOn, powerOff, shutdown 34 - support < 1GB RAM in clones 31 - bugfix to remove existing NICs from a template on clone 25 27