title: Could not find method jcenter() for arguments [] on repository container
body: <p>I'm new to Gradle and bintray. I want to publish <a href="https://bintray.com/micronautics/Java-WebSocket/Java-WebSocket/view">this project</a> so it is readily available to Maven and SBT users. I am not the original author of this package; it <a href="https://github.com/TooTallNate/Java-WebSocket/issues/252">appears to have been abandoned</a>; I just want to publish the current HEAD.</p>
  
  <p><code>~/.gradle/gradle.properties</code> is something like:</p>
  
  <pre><code>bintrayUser=mslinn
  bintrayKey=blahblah
  </code></pre>
  
  <p><code>build.gradle</code> looks like this.:</p>
  
  <pre><code>buildscript {
      repositories {
          jcenter()
      }
      dependencies {
          classpath 'com.jfrog.bintray.gradle:gradle-bintray-plugin:1.0'
      }
  }
  apply plugin: 'com.jfrog.bintray'
  
  allprojects {
      apply plugin: 'idea'
  
      group = 'org.jfrog.example.bintray.gradle'
      version = '1.0'
  }
  
  subprojects {
      apply plugin: 'java'
      apply plugin: 'maven-publish'
      apply plugin: 'com.jfrog.bintray'
  
      sourceCompatibility = 1.6
      targetCompatibility = 1.6
  
      dependencies {
          testCompile 'junit:junit:4.7'
      }
  
      // custom tasks for creating source/javadoc jars
      task sourcesJar(type: Jar, dependsOn: classes) {
          classifier = 'sources'
          from sourceSets.main.allSource
      }
  
      task javadocJar(type: Jar, dependsOn: javadoc) {
          classifier = 'javadoc'
          from javadoc.destinationDir
      }
  
      // add javadoc/source jar tasks as artifacts
      artifacts {
          archives sourcesJar //, javadocJar
      }
  
      repositories {
          jcenter()
      }
  
      publishing {
          publications {
              mavenJava(MavenPublication) {
                  if (plugins.hasPlugin('war')) {
                      from components.web
                  } else {
                      from components.java
                  }
  
                  artifact sourcesJar {
                      classifier "sources"
                  }
  
                  artifact javadocJar {
                      classifier "javadoc"
                  }
              }
          }
      }
  
      bintray {
          user = bintrayUser //this usually comes form gradle.properties file in ~/.gradle
          key = bintrayKey //this usually comes form gradle.properties file in ~/.gradle
          publications = ['mavenJava'] // see publications closure
          pkg { //package will be created if does not exist
              repo = 'Java-WebSocket'
  //            userOrg = 'myorg' // an optional organization name when the repo belongs to one of the user's orgs
              name = 'Java-WebSocket'
              desc = 'Current HEAD of abandoned project'
              licenses = ['MIT']
              labels = ['websocket', 'java']
          }
      }
  }
  
  task wrapper(type: Wrapper) {
      gradleVersion = '1.10'
  }
  </code></pre>
  
  <p>Here is the problem:</p>
  
  <pre><code>$ gradle bintrayUpload
  
  FAILURE: Build failed with an exception.
  
  * Where:
  Build file '/var/work/experiments/websockets/Java-WebSocket/build.gradle' line: 3
  
  * What went wrong:
  A problem occurred evaluating root project 'Java-WebSocket'.
  &gt; Could not find method jcenter() for arguments [] on repository container.
  
  * Try:
  Run with --stacktrace option to get the stack trace. Run with --info or --debug option to get more log output.
  
  BUILD FAILED
  </code></pre>
  
  <p>I'm looking for advice on how to solve the error message, and advice on any setup issues I am likely to encounter including this project into JCenter so the published bintray project is available to all.</p>