Implement prototype nodes for each input / output combination

[gab1one]

There are different possible input / output mappings for Ops, all of which we need to cover with prototype nodes.

• 0-to-1, for Commands that create new data (eg, a Kernel), see: Support "0-to-n" Commands #24
• 1-to-1, for Commands that create one output row for one input row (e.g. filter application), see: Support "1 to 1" Commands #25
• 1-to-n, for Ops that create several output rows for one input row (e.g. feature extraction), see: Support "1-to-n" Commands #26

[gab1one]

This issue was moved to knime-ip/knip2#18

[dietzc]

why did you move this to knip2? this issue is not image processing specific!

[Squareys]

@dietzc All but 0-1 have been prototyped in #49, right?

[dietzc]

right