Add new WMI query to DBInfo plugin.

Remove commented out code from WMI and REG monitorlib extensions
Add code to WMI extension to handle querys
Initial version of targetWMI.cs
Initial version of TargetQueryWMI.cs
Remove commented out code from Phase worker.
Make Order optional in Query def.  They will automatically be executed after explicitly Order'ed querys
Add IsArray and IsSysCol property to ResultSignatureCol
Remove base method GenerateResultSignature from Target and TargetQuery.
Temp remove Primary key def from persist tables
Remove unneeded try-catch in TableDefPersist