Clickable ransack filters

With some javascript and minor html changes I created clickable ransack filters.
By hovering a table row filters show up behind the filterable data.
When you click it the filters are added to ransack true javascript.
You can delete the filters by just remove them from the active filters.
This works really nice. Please let me know what you think about this and if this needs any specs.

![screen_shot_2014-12-26_at_18_28_59](https://cloud.githubusercontent.com/assets/106335/5558572/2e42baf2-8d2d-11e4-8060-90b3239232f6.png)