Merge pull request #105 from dougm/esxcli

Add host.esxcli command
Add DiskFlag adpater option
Remove unused DiskFlag.Copy method
Merge pull request #107 from dougm/ide-disk

Add DiskFlag adpater option
tasks are no longer generated
Generate mo types regardless of props
Regenerate mo types
Support DistributedVirtualPortgroup in lister
Add DVS support to NetworkFlag

Fixes github issue #108
Merge pull request #110 from dougm/dvs

Add DVS support to NetworkFlag
Handle empty values in esxcli