* remove settings duplication between AkkaBuild and project specific .sbt files
* do not publish test projects
* run akka-http-core tests
* fix lambda sample project versions
* remove obsolete projects (streamAndHttp, httpParent, docsDev)
* exclude parsing project from unidoc
* update to the latest sbt
> merged akka-bench-jmh-dev with akka-bench-jmh
> renamed akka-stream-tck to more correctly named akka-stream-tests-tck
> merged java8 tests with normal tests in http
... instead of an ad-hoc implicit one.
This has the advantages that implicit (un)marshaller construction doesn't require an implicit EC anymore (a point that often tripped up users because the errors are mostly unhelpful or even misleading) and the ExecutionContext for all of the routing DSL is now configured in one central point (when constructing the `RequestContext`).
