Operator: Where (alias to filter)

[benjchristensen]

Filter already exists, alias 'where' to it:

http://msdn.microsoft.com/en-us/library/hh211607(v=vs.103).aspx
http://msdn.microsoft.com/en-us/library/hh229267(v=vs.103).aspx

[jmhofer]

This issue looks like it could be closed, as the resepctive pull request is closed, too.