Make the parset filterable to exclude data you don't care about

![screen shot 2014-07-18 at 11 01 27 am](https://cloud.githubusercontent.com/assets/430385/3629912/9af8b2ca-0ea5-11e4-8f10-ccad2521bd63.png)

See: https://github.com/GigaOM/legacy-pro/issues/3837