Merge branch '1.17'

Merge branch '1.16' into 1.17

Merge branch '1.15' into 1.16

Really not interested in managing dependencies in 2-3 places.

Also minor README prose cleanup

Merge branch '1.16' into 1.17

Merge branch '1.15' into 1.16

Really not interested in managing dependencies in 2-3 places.

Also minor README prose cleanup

Cut 1.16

Cut 1.16

Cut 1.15.4