Upload files to "src/c"

src/c/messaging.h

@@ -0,0 +1,7 @@
+#pragma once
+
+  void send(int key, int value, int key2, int value2, int key3, char value3[64]);
+  void inbox_received_callback(DictionaryIterator *iterator, void *context);
+  void message_dropped(AppMessageResult reason, void *context);
+  void message_out_success(DictionaryIterator *iter, void *context);
+  void message_out_failed(DictionaryIterator *iter, AppMessageResult reason, void *context);