I'm wondering if I installed this correctly. Does the whole file go into the plugins file in Omeka, or just a part of it? (Using Omeka Classic v2.6.) <img width="571" alt="screen shot 2018-04-16 at 2 28 59 pm" src="https://user-images.githubusercontent.com/889407/38836328-91f02eba-4182-11e8-88c9-fcb17347d126.png">