Adding publication import in overlay.

#4347 

There are still a problem with the redirect after importing via the modal - i'm currently working on it:
![screenshot from 2013-11-27 15 09 29](https://f.cloud.github.com/assets/1222368/1631609/0ba877ac-5769-11e3-87ce-05e627e14161.png)
![publication import](https://f.cloud.github.com/assets/1222368/1631613/15a300a6-5769-11e3-9c1a-b2cec75f7a04.png)