[Rock-dev] New type to represent 3D range measurements

[Jakob Schwendner]

> What about:
>   - DepthInformation
>   - Depth3D
>   - DepthMap <- from computer graphics: fits perfectly:
> http://en.wikipedia.org/wiki/Depth_map
I like DepthMap as well, although Scan3D is likely more identifiable.

> The start angle is not needed. The direction should be defined by the
> middle of the "image", the start angle can be calculated by the
> resolution or accumulated by the sum of irregular angles used.
The good thing about having start and end values is that you can encode the complete camera matrix (center point and focal length). 

Cheers,

Jakob