bind-emitter.tap.js mods to elucidate test scenarios

The location of the ee.emit call is different from one test case to the next.  I did not catch that initially and spent some time scratching my head.  This patch documents that difference in the test case description.  Further, it adds the non-state-preserving test case  "register out-of-context, emit out-of-context" for clarification of what is and is not supposed to work.  Thank you.