- Fixed FTransform (GridDetector.cpp: l.1393 - I'm wondering how the first demo try worked so well with this...)
- Initialized FVector with zeros (GridDetector.cpp: l. 1264, in rare cases this seemed to be not 0).
- Fixed Illegal Memory Access in rare cases (GridDector.cpp: l. 963, 1246).

Separated the grid detection and registration in an extra thread so that the kinects can run at 30fps and the time difference between the used point clouds is smaller.