update homepage URL

Author: rkuhn

build.sbt

@@ -6,7 +6,7 @@ scalaVersion in ThisBuild := "2.10.3"
 
 licenses in ThisBuild := Seq("CC0" -> url("http://creativecommons.org/publicdomain/zero/1.0/"))
 
-homepage in ThisBuild := Some(url("https://groups.google.com/forum/?hl=en#!forum/reactive-streams"))
+homepage in ThisBuild := Some(url("http://www.reactive-streams.org/"))
 
 publishTo in ThisBuild := Some("releases" at "https://oss.sonatype.org/service/local/staging/deploy/maven2")
 
@@ -25,7 +25,7 @@ pomExtra in ThisBuild := (
     <developer>
       <id>reactive-streams-sig</id>
       <name>Reactive Streams SIG</name>
-      <url>http://reactive-streams.org</url>
+      <url>http://www.reactive-streams.org/</url>
     </developer>
   </developers>
-  )
+  )