Test commit
Merge branch 'master' into dara

To merge the new command in clearning up the index from deleted files
added new command for cleaning up the index of post that have been removed from the pg db
Merge branch 'master' of https://github.com/MTG/freesound
fix for issue #474: added a check for the operating system type. If it's linux the upper case extensions are included in the filter as well.
Merge branch 'dara'