Make RhinoJSEnv final
Centralize overriding of stop in ComJSEnv
Give multiple closed states to RhinoJSEnv.Channel
Fix #1314: Make sure Rhino always closes Com
Improve information in thrown ComClosedExceptions
Fix #1073: New test framework interface (aligned with sbt)
Merge pull request #1289 from gzm0/test-interface

New test interface