Queue and playlist interactions with lkt

Closes #56 (closed) and #54 (closed)

Adds a way to import a playlist into the queue

inc/common/queue.h

@@ -7,7 +7,7 @@ enum lkt_event_type {
     lkt_event_null      = 0,            /* NULL         */
     lkt_event_play_pos  = (1 << 1),     /* size_t       */
     lkt_event_play_file = (1 << 2),     /* const char*  */
-} type;
+};
 
 #define lkt_event_play (lkt_event_play_pos | lkt_event_play_file)