Use bootstrap css for the print directive

This PR use bootstrap to make the print directive more compliant with the rest of the app.

This PR also remove the fontawesome stuff  for the checkboxes because it's redundant with boostrap style.

![map geo admin ch](https://f.cloud.github.com/assets/621420/2259646/7c5f7c24-9e37-11e3-8381-9ed99488f940.png)