Publishers listing

Several changes to the publisher listing:

* Calling a snippet 200 times is really slow, so the code has moved
  directly to organization_list.html
* Publihser organization type needs to be get from a helper function, as
  the result of group_list does not include the extras. This slows the
  rendering a bit, we can look at ways of improving it later.
* A js script is used to be able to sort the the table clicking on the
  headers. New resource config added for that.
Better style for sortable table