Fixes and new apps (#30)

- M5 Unit Modules library + M5 Unit Test app
- Minor fixes for TodoList, TwoEleven, Snake, Brainfuck and Breakout
- Fixed SerialConsole to use the uart controller as it was broken in one of the many updates
- Fixed keyboard input in TwoEleven, Breakout, Magic8Ball and Snake
- Bluetooth Media Keys app, supports pressing physical keys to trigger the corresponding buttonmatrix button
- Epub Reader app

Apps/MediaKeys/main/Source/main.cpp

@@ -0,0 +1,11 @@
+#include "MediaKeys.h"
+#include <TactilityCpp/App.h>
+
+extern "C" {
+
+int main(int argc, char* argv[]) {
+    registerApp<MediaKeys>();
+    return 0;
+}
+
+}