v2.2.4: Add sink.close (#898)

critzo released this 13 Jul 20:15

aacc0b3

* add json annotations

* improve error logging

* add Sink.Close

* travis log each outcome

* improve comments on errors

* return Put errors

* disable manual GCS test

* improve ProcessAll error handling comments

* Add closer to task instead of parser

* move row.NullCloser

* update bindata

Assets 2