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

![screen shot 2014-07-18 at 10 53 35 am](https://cloud.githubusercontent.com/assets/430385/3629811/7a9c8caa-0ea4-11e4-9294-fd8d1352a8c3.png)

See: https://github.com/GigaOM/legacy-pro/issues/3837