Dr panel copy button

I finally finished adding the copy to clipboard buttons to the panels! I also did some minor formatting updates to panels (see commits for specific changes)

![image](https://cloud.githubusercontent.com/assets/5275384/5146493/05617920-7162-11e4-9ed1-ad29b82c9aa9.png)

![image](https://cloud.githubusercontent.com/assets/5275384/5146495/0e9a2fc8-7162-11e4-890d-1336545dd8f9.png)

When reviewing: 

1) Test the copy button under "all emails"
2) Test the copy button under "selected emails" by selecting some emails in the table and clicking on the second copy button 

Feel free to check this on both panel views (i.e. by clicking on the hire button on task and also by going to the non-task specific panel, which can be accessed at http://localhost:3000/workers/index)