Remove deprecated property

Keep Together will always be True for Affinity rule.

Issue #233
Remove Deprecated property

Keep Together will always be True for Affinity rule.

Issue #233
Remove deprecated property

Keep Together will always be False for AntiAffinity rule.

Issue #233
Update from Issue #236

New code to move away from limitations of Get-VIEvent
Update from Issue #235

New code from Issue #235. May still be some events that are not returned. Failed (s)vMotions will not be listed.
Include Get-VIEventPlus by LucD. 

Updated plugins to use this function to resolve a few issues raised.
Fixing $NULL false evaluation

$NULL wasn't well evaluated, switching to "" instead
Merge pull request #238 from Sneddo/master
New Plugin: VMDK consistency

This simple plug-in checks if every FLAT-VMDK file found in a folder, has a corresponding VMDK file also present

Merged code from issue #207