Fixed demos and guide code samples to reflect the 1.0 API change of the task() methods from returning a DataflowVariable to returning a Promise
Update extra166y code in line with the JSR166 mainline.
A few code style changes to keep in sync with the mainline code.
Update extra166y to keep consistency with mainline.
update recent changes in the master Extra166y sources.
Update the extra166y fork to keep it up to date to mainline.
Fixed operator handling of missing input or output channels