Add: tool to generate random clouds

[chambbj]

No description provided.

[taketwo]

Morphological? :)

[taketwo]

Wouldn't it make sense to group the options in the help to avoid repetition? Something like:

  * method
  * width
  * height
Options for uniform distribution:
  * xmin - ...
  * ...
Options for normal distribution:
  * ...

[chambbj]

@taketwo This look better?

[taketwo]

Yes, thank you.

Hmm.. speaking about width and height. In PCL, if height is >1, the point cloud is considered organized. This implies, for example, that two points that go one after another in the point cloud storage vector are also neighbors in the spatial domain. Some algorithms take advantage of this fact. But when a point cloud is generated randomly it is obviously not organized. So I think rather than having "width" and "height" parameters it is better to just have "size" and generate a point cloud with dimensions size x 1, so it is considered unorganized.

(I have no clue why the fill function takes width and height, for the mentioned reasons I think this does not make any sense.)

[chambbj]

@taketwo Good point. Fixed in the latest commit.

[taketwo]

Great, merging this!