Bill Daly - 2016-11-16

I've uploaded assert.apl and modified some of the unit test workspaces.

At this writing there are two functions toScreen and return. Each function is dyadic where the left argument is the expected result and the right, a character string, the test command. This is just a begining.

Unit testing frameworks are complicated, try the Python documentation for unittest. I haven't thought how we ought to proceed and all idea are welcome.