Automate release procedure

Author: pangiole

README.md

@@ -160,4 +160,5 @@ This software comes with [Apache License 2.0](http://www.apache.org/licenses/LIC
 [gitter-url]: https://gitter.im/angiolep/akka-wamp?utm_source=badge&utm_medium=badge&utm_campaign=pr-badge&utm_content=body_badge
 
 [download-image]: https://api.bintray.com/packages/angiolep/universal/akka-wamp/images/download.svg
-[download-url]: https://bintray.com/angiolep/universal/akka-wamp/_latestVersion
+[download-url]: https://bintray.com/angiolep/universal/download_file?file_path=akka-wamp-0.15.2.tgz
+

core/build.sbt

@@ -31,13 +31,7 @@ publishMavenStyle := true
 
 isSnapshot := false
 
-publishTo := {
-  val nexus = "https://oss.sonatype.org/"
-  if (isSnapshot.value)
-    Some("snapshots" at nexus + "content/repositories/snapshots")
-  else
-    Some("releases"  at nexus + "service/local/staging/deploy/maven2")
-}
+publishTo := sonatypePublishTo.value
 
 publishArtifact in Test := false
 

docs/src/main/paradox/router.md

@@ -24,7 +24,7 @@ tgz
 @@snip[application.conf](../../../../core/src/main/resources/reference.conf){ #router }
 
 [download-image]: https://api.bintray.com/packages/angiolep/universal/akka-wamp/images/download.svg
-[download-url]: https://bintray.com/angiolep/universal/akka-wamp/_latestVersion
+[download-url]: https://bintray.com/angiolep/universal/download_file?file_path=akka-wamp-0.15.2.tgz
 
 ### Transports
 An application can bind one or more listeners. Each listener corresponds to a named transport in the configuration file and it will bind to the configured endpoint. Usually, endpoints are configured for different schemes such as ``ws`` for WebSocket or ``wss`` for WebSocket with TLS - Transport Layer Security. Additional transport configuration falls back to the default one for missing keys (e.g. no need to repeat the ``format`` key) 

project/plugins.sbt

@@ -1,10 +1,16 @@
 
 resolvers += "Typesafe Repository" at "https://repo.typesafe.com/typesafe/releases/"
 
+// see https://github.com/xerial/sbt-sonatype
+addSbtPlugin("com.jsuereth" % "sbt-pgp" % "1.1.0")
+addSbtPlugin("org.xerial.sbt" % "sbt-sonatype" % "2.3")
+
+
 addSbtPlugin("com.typesafe.sbt" % "sbt-native-packager" % "1.3.3")
 
-addSbtPlugin("org.scoverage" % "sbt-scoverage" % "1.5.1")
 
+addSbtPlugin("org.scoverage" % "sbt-scoverage" % "1.5.1")
 addSbtPlugin("com.codacy" % "sbt-codacy-coverage" % "1.3.11")
 
+
 addSbtPlugin("com.lightbend.paradox" % "sbt-paradox" % "0.3.2")