list: Clarify --depends-on behavior

[jbohren]

@wjwwood Currently, catkin list --depends-on only shows the direct dependencies of each package. Is this the correct behavior, or should it be recursive?

[wjwwood]

That's a good question. My gut reaction is that the pair --depends-on and --depends-on-recursive are clearer than the pair --depends-on-1 and --depends-on, which are direct dependencies and recursive dependencies respectively. However, I've seen both patterns used in similar command line options.

[jbohren]

I also like "recursive" since the meaning is clearer.

[jbohren]

This should be fixed in #293.