[FL-1398] IRDA: Implement timings encoder, add RC-6 (#570)

* Add RC-6 protocol
* Implement timings Encoder
* Remove Unit-tests from build

applications/irda_monitor/irda_monitor.c

@@ -20,7 +20,7 @@ typedef struct {
 } IrdaDelaysArray;
 
 typedef struct {
-    IrdaHandler* handler;
+    IrdaDecoderHandler* handler;
     char display_text[64];
     osMessageQueueId_t event_queue;
     IrdaDelaysArray delays;