Fix invalid return of metadata_editor_append_picture() and adds debug logs. 14/233914/7
-rwxr-xr-x 45 AUTHORS
-rwxr-xr-x 2641 CMakeLists.txt
-rwxr-xr-x 11357 LICENSE.APLv2.0
-rwxr-xr-x 211 NOTICE
-rwxr-xr-x 68 capi-media-metadata-editor.manifest
-rwxr-xr-x 289 capi-media-metadata-editor.pc.in
drwxr-xr-x - doc
drwxr-xr-x - include
drwxr-xr-x - packaging
drwxr-xr-x - src
drwxr-xr-x - test