Find methods without some last parameters

Fixes #54

Now we find methods missing both first parameters and last parameters,
although not at the same time

This should be rewritten just to do complete subsets instead, but we
don't use it for more than 2 parameters right now, so it this is easier
Actually invoke methods with missing params

Issue #54

To follow up the last commit, we need to actually call the methods
properly if some params are missing, before was all or nothing.

The Basic->TouchUp example now works properly