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`)

Buildscripts/release-sdk.sh

@@ -21,8 +21,7 @@ mkdir -p $tactility_library_path/Binary
 cp build/esp-idf/TactilityC/libTactilityC.a $tactility_library_path/Binary/
 mkdir -p $tactility_library_path/Include
 find_target_dir=$build_dir/$tactility_library_path/Include/
-cd TactilityC/Source
-find -name '*.h' | cpio -pdm $find_target_dir
+cp TactilityC/Include/* $find_target_dir
 cd -
 cp Documentation/license-tactilitysdk.md $build_dir/$tactility_library_path/LICENSE.md