Get-ConfigurationData does not filter data

I ran into a problem where the filtering wasn't working as expected.  Taking a look at this I discovered that the switch statement was only ever hitting default.

The basic change was to add "filter" to the switch statement to match the parameter set name. I also cleaned up the style a bit 'cause of my personal OCD, though I can completely roll that back if needed.
Merge pull request #57 from ArtWDrahn/patch-2

Get-ConfigurationData does not filter data