Project restructuring (fixes macOS builds) (#198)

- Create `Include/` folder for all main projects
- Fix some issues here and there (found while moving things)
- All includes are now in `Tactility/` subfolder and must be included with that prefix. This fixes issues with clashing POSIX headers (e.g. `<semaphore.h>` versus Tactility's `Semaphore.h`)

TactilityCore/Include/Tactility/TactilityCore.h

@@ -0,0 +1,13 @@
+#pragma once
+
+#include <cstdio>
+
+#include "Check.h"
+#include "CoreDefines.h"
+#include "CoreExtraDefines.h"
+#include "EventFlag.h"
+#include "kernel/Kernel.h"
+#include "kernel/critical/Critical.h"
+#include "Log.h"
+#include "Mutex.h"
+#include "Thread.h"