Better input

I've been adding methods and software to the DB slowly, I think due to a somewhat awkward interface. TreeTapper is currently configured so that various traits of a method or program (criterion, character type, etc.) are selected from pull down menus or tables. If an element isn't there (such as a particular format of tree file), I currently have to go to a separate page, add the item, and then reload the first page. I'd been playing a bit with having popup panels for this entry and have decided to just do them. This will simplify, for a user, adding things to a database: she or he can just go to the add method, add software, or add reference pages.