The --help-outputs and --help are embedded in the README.md
To make it easier to read now options are enclosed in `` and the list of
outputs is sorted.
Implemented in a different way.
For all internal commands now we use Python bindings to fill the zones as
suggested by @arikrupnik in johnbeard/kiplot#11
For 'print_pcb' now we ask KiCad to do it before printing (needs v1.4.1)
Now the tests are simpler, I also suitched to test the application from "outside"
because I was having some ridiculous fails.
Also added coverage meassurement, which is currently pathetic.