Add proxy support.
change how the datacenter is found

Instead of using serviceInstance.find_datacenter to find the datacenter by name, loop through rootFolder.children looking for a child that has that name and is a datacenter.
The reason to do this is that rootFolder.children is populated with the children that the user has permissions to see. serviceInstance.find_datacenter does rootFolder.traverse which requires the permission to search through all the children
added command to get the datastore with the most free space
moved REGEX parameter to maxfree command
Merge pull request #75 from CoreMedia/master

added command to get the datastore with the most free space
Merge pull request #70 from RallySoftware/master

added command vm move
Merge pull request #69 from b-dean/find_datacenter_without_traverse

change how the datacenter is found
Merge pull request #67 from dcondomitti/proxy_support

Add proxy support for interacting with vSphere server.
version/changelog ++
Added support for datacenters in subfolders
Merge pull request #77 from andrewfraley/master

Added support for datacenters in subfolders