and remove a lot of stale parfait boots from tests (from before using rubyxc)
previous commit affected rather many test, as the implicit returns add extra instructions Also added some explicit returns, so as not to test the return logic too much. return (ie return nl) is a knonwn 3 risc operation.
So that vool layer never has complex conditions or returns Start with while, next if, return and assign
All but those requiring boot functions
