= can: add test validating that SetRequest/TimeoutTimeout message work, refs #731
= can: don't require use of CommandWrapper with SetRequest/TimeoutTimeout, fixes #731
= can: don't crash if responder to HttpRequest is null, fixes #788
= httpx: DRY up *JsonSupportSpec
= httpx: test and unify error behavior in *JsonSupport classes, fixes #742
! httpx: DRY up Json4s(Jackson)Support, which is not strictly source compatible but should be binary compatible
= io: try to ignore/tone down warnings in BackPressureHandling, fixes #771
Merge pull request #791 from jrudolph/i/731

Fix 731
Merge pull request #792 from jrudolph/i/742-better-exceptions-with-Json4s

I/742 better exceptions with json4s
Merge pull request #793 from jrudolph/i/771-tone-down-warnings-with-backpressure

= io: try to ignore/tone down warnings in BackPressureHandling, fixes #771