Added a new setting: "cleanup"
Added a new setting: "cleanup"

There are situations where you do not want to delete a previously uploaded file when uploading a new one into the same column.

I therefore added a new setting "cleanup" which, if set to false, prevents the old file from being deleted during cleanup.
chainat/uploader,qsdqsdsdqsdqsdqsdsdqsd/uploader,milesj/uploader