Graph facet fix

Hi Roman,
Here are the facet changes and some css changes to the layout. The issue with the "showMore" button was that the widget was calling the function "onPagination" when it should have been calling "handlePagination"; I don't know how that happened. I also made the necessary changes to discovery.html.

I still need to fix some css for the responsive layout because if you make the screen ipad-sized you will see things start to go out of whack.

Did you know that the showMore button is still not working properly for the refereed and database facets? Should I try to fix it for my own edification, or do you want to do it more efficiently?