rather large commit, but essentially a simple rename Rationale in docs and blogs
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.
both class and normal sending tests at vool / mom level
seems to make the essence clearer also extracted base class
improve vool test dirs
