Pass back the location of the downloaded files in queue items

This allows a third party user to locate downloaded files from a
previous session (i.e. if they weren't connected to receieve the
updateQueue requsts)

deemix/app/downloadjob.py

@@ -517,6 +517,7 @@ class DownloadJob:
 
             logger.info(f"[{track.mainArtist['name']} - {track.title}] Track download completed\n{writepath}")
             self.queueItem.downloaded += 1
+            self.queueItem.files.append(writepath)
             if self.interface:
                 self.interface.send("updateQueue", {'uuid': self.queueItem.uuid, 'downloaded': True, 'downloadPath': writepath})
             return result

deemix/app/queueitem.py

@@ -10,6 +10,7 @@ class QueueItem:
             self.type = queueItemDict['type']
             self.id = queueItemDict['id']
             self.bitrate = queueItemDict['bitrate']
+            self.files = queueItemDict['files']
             self.downloaded = queueItemDict['downloaded']
             self.failed = queueItemDict['failed']
             self.errors = queueItemDict['errors']
@@ -23,6 +24,7 @@ class QueueItem:
             self.type = type
             self.id = id
             self.bitrate = bitrate
+            self.files = []
             self.settings = settings
             self.downloaded = 0
             self.failed = 0
@@ -37,6 +39,7 @@ class QueueItem:
             'artist': self.artist,
             'cover': self.cover,
             'size': self.size,
+            'files': self.files,
             'downloaded': self.downloaded,
             'failed': self.failed,
             'errors': self.errors,