=doc #16134 read file as binary stream, because StreamReader expects binary
=doc Link to CONTRIBUTING.md and remove obsolete dev guidelines

(cherry picked from commit 84382f06494e908a2fa5e1ab452ba0fe770ba239)
=pro Grab binary version for MIMA combatibility testing from a setting.

Thanks to @jsuereth
=per fixed small typo in parameter name

Small typo. Was replayPersistent instead replyPersistent and withReplyPersistent did not work
Merge branch 'master' of https://github.com/dawidmalina/akka