Change Attributions to Attribution in License Agreement

Also, I think we need to remove the "s" from "Attributions" to be "Attribution" in the license deed section info tab (As per a note from Creative Commons) e,g,->
License Deed:Creative Commons Attributions 3.0

Paul - Updated the translation file which fixes all of the Wiki pages but you will need to fix the JS pages in the Add Path.

Thanks.