[RFR] Filter column

- [x] Isolate `datagrid`, `quick-filter` & `dashboard-panel` directives
- [x] Rename `*-button` & `view-actions` to `ma-*-button` & `ma-view-actions`
- [x] Add filter field on each column
- [x] Use filters on each queries
- [x] Add tests
- [x] Add functionnal tests

Screen:
![filter](https://cloud.githubusercontent.com/assets/2076632/5469171/e06e8104-85d8-11e4-89fe-4564b9075a8c.png)