Ability to chain together multiple OSN runs

[geo-wizard]

Incorporate the ability for OSN to run multiple models one after another. Example = the configuration file has multiple models in it with different bounding boxes and OSN will run through them all while only requiring the configuration file to be submitted once. Either resulting in multiple output shapefiles or allowing the user to choose to join the files together.

[avitebskiy]

That may not be the best idea, but we should keep this issue and discuss possibilities.