Support the new org.gwtproject maven groupId (#404)

Fixes #403

Author: foal

plugins/com.gwtplugins.gdt.eclipse.maven/src/com/google/gdt/eclipse/maven/sdk/GWTMavenRuntime.java

@@ -52,6 +52,7 @@
 public class GWTMavenRuntime extends ProjectBoundSdk {
 
   public static final String MAVEN_GWT_GROUP_ID = "com.google.gwt";
+  public static final String MAVEN_GWT_NEW_GROUP_ID = "org.gwtproject";
   public static final String MAVEN_GWT_DEV_JAR_ARTIFACT_ID = "gwt-dev";
   public static final String MAVEN_GWT_USER_ARTIFACT_ID = "gwt-user";
   public static final String MAVEN_GWT_SERVLET_ARTIFACT_ID = "gwt-servlet";
@@ -154,7 +155,11 @@ public File getDevJar() throws SdkException, JavaModelException {
     IPath path = MavenUtils.getArtifactPathForPeerMavenArtifact(classpathEntry.getPath(), MAVEN_GWT_GROUP_ID,
         MAVEN_GWT_DEV_JAR_ARTIFACT_ID);
     if (path == null) {
-      throw new SdkException("Unable to locate gwt-dev.jar");
+      path = MavenUtils.getArtifactPathForPeerMavenArtifact(classpathEntry.getPath(), MAVEN_GWT_NEW_GROUP_ID,
+          MAVEN_GWT_DEV_JAR_ARTIFACT_ID);
+      if (path == null) {
+          throw new SdkException("Unable to locate gwt-dev.jar");
+      }
     }
 
     if (!path.toFile().exists()) {