Move common settings to an autoplugin

[2m]

Fixes #408

inThisBuild sets project scope to the current build, but settings set in the /build.sbt are added to the root project only.

Instead moved common settings to an AutoPlugin that is applied to every project.

[akka-ci]

Test PASSed.

[ktoso]

LGTM, thanks for the fix. Very weird that this is how inThisBuild works there... Oh well

[ktoso]

I'll release RC1 again, so it has the proper version suffix.

[jrudolph]

I don't think this was necessary. We set crossPaths := false in Publish.scala which is what disables the version suffixes.

[ktoso]

Why did we have crossPaths false anywhere in the first place...? Weird.
I think you're right.

I published the correct artifacts now (@2m's patch also works, but we should remove that crossPaths := false I think)

[jrudolph]

Yes, we need to remove that. Otherwise, we might rely on the ordering of loading plugins.

[2m]

crossPaths := false makes sure that there is only one target directory even when cross building. It is required during the release process. So everything ends up in the same directory, which then can be uploaded to S3.

[ktoso]

S3 upload what? We don't do a distribution here hm.

[2m]

Yes, you are right. Akka Http does not publish to S3. Akka does. And that is where crossPaths := false came from. So from release point of view having crossPaths := false is fine.

[ktoso]

Uhm, you mean removing it is fine, since we don't use it - we don't have a "release" (zip) here,