Avoiding Small Obstacles on the Gruond

[Martin_Guenther]

@AlexReimann

From my experience the 3D sensors on the market (Asus Xtion, Orbbec Astra, Kinect) should be kind of accurate enough to go down to 0.3 cm.

Small correction: I guess you meant 3 cm (as per the original question), not 0.3 cm, right?