Create RGBDImage without truncation

Truncating the depth of an RGBDImage is very helpful when working with a ScalableTSDFVolume, as it keeps the scale of the volume to a reasonable size.

However when working with a UniformTSDFVolume the resolution of the volume is fixed, so there is no need to truncate it.

I get much better results when keeping all depth data, especially depth data that is outside of the volume. Even though that data is outside of the volume, it is still helps define empty voxels, and cleans up the volume.

Truncating the depth map and removing this data results in a significantly worse mesh.

For now I can set "depth_trunc" to a high value, but it would be best to keep the depth map as is and skip truncation entirely.