design updates

Signed-off-by: Anna Schumaker <schumaker.anna@gmail.com>

design/footer.txt

@@ -117,3 +117,5 @@ Future work:
 	- Playqueue and database inherit from common class
 	- "About" dialog
 	- Investigate "Bulk insert" callbacks for performance
+	- Initialize PQs with multiple flags
+	- Prefill Song structures in each library :: Track

design/playqueue.txt

@@ -55,8 +55,8 @@ Playqueue: (lib/playqueue.cpp)
 		void del(playqueue_id);
 		unsigned int size();
 
-		void clear_sort();
 		void add_sort(sort_t);
+		void reset_sort(sort_t);
 
 		unsigned int next();
 		void reset_cur();