Get deletion of StillImage, WebLink, Video, AudioRecording working.
Merge branch 'ek-doc-upload' into ek-fix-delete
Make deleting Documents work
Merge branch 'kete2' into ek-fix-delete
Merge branch 'kete2' into ek-fix-delete
Merge pull request #35 from kete/ek-fix-delete

Make deleting things (other than topics) work.