Update todo list

examples/xua_lite_example/todo.txt

@@ -1,20 +1,22 @@
 - Bring ep0 serivice into xua_buffer select (make control mem) (DONE)
-- Tidy feeback endpoint (DONE)
+- Tidy feedback endpoint (DONE)
 - Input path + FIFO (DONE)
 - Function prototypes into includes (DONE)
 - Single input/ouput format (DONE)
 - Get UAC1 / FS working (DONE)
-- Optimised EP buffer (either triple block or block FIFO) 
+- Optimised EP buffer (either triple block or block FIFO) (DONE)
 - Fix output gain issue (IN PROGRESS)
 - Add timer to xua_buffer to prepare for exchange with audio (remove backpressure to audio) (WONT DO - use port buffer and reduce case overhead)
 - Adaptive endpoint EP and descriptors (DONE)
 - Adpative clock control (IN PROGRESS)
-- Proper control loop w/filtering
+- Proper control loop w/filtering (IN PROGRESS)
 - Switchable MICS using define (WONT DO - separate app)
 - DFU
 - Combinable EP0 (DONE)
 - Interrupt EP0 option
 - Control processing
 - Fix cast warning (DONE)
-- Work out why no clock drift on Android / OSX (drift seen on Linux and Win)
+- Work out why no clock drift on Android / OSX (drift seen on Linux and Win) (DONE)
 - Tidy/cut down EP0 handling
+- Broader host testing (Android, W10, MAC) (IN PROGRESS)
+- Peer review