Break after function is called

[oxinabox]

Right now we break before a function is called,
and #4 will allow use to intervene and change its arguments.

We should also break after, (color the primpts green for going up, and maybe an arror, for in/out)
and during an aftter break point the user should be able to ijnterviene and change the return values.

[oxinabox]

closed/made meaningless in #23 v