Relocate 'input' folder.

src/input/InputBroker.cpp

@@ -0,0 +1,18 @@
+#include "InputBroker.h"
+
+InputBroker *inputBroker;
+
+InputBroker::InputBroker()
+{
+};
+
+void InputBroker::registerSource(Observable<const InputEvent *> *source)
+{
+    this->inputEventObserver.observe(source);
+}
+
+int InputBroker::handleInputEvent(const InputEvent *event)
+{
+  this->notifyObservers(event);
+  return 0;
+}