Create pause-able search for cliffs on a local machine

If one or more of us can run a search in terminal to try to track down cliffs, specifically in SNAP, that could be useful. There would be millions of runs. We'd either need to be able to pause or to chunk it into different runs so that it doesn't have to just run forever on everyone's machine.

It'd also be nice to save the output. We could possibly use it later to test against already-existing SNAP calculators.

We'll try to describe some of the parameters for that in here.