title: Yaml error - mapping values are not allowed here
body: <p>I'm trying to use a yaml file but whenever I try to read from it I get:</p>
  
  <pre><code> Exception in thread "main" mapping values are not allowed here in "&lt;reader&gt;", line 7, column 19
  </code></pre>
  
  <p>The yaml file:</p>
  
  <pre><code>topology:
  - name: teststormsignals
    jar: storm-signals-0.2.1-SNAPSHOT.jar
    topologyclass: backtype.storm.contrib.signals.test.SignalTopology
    packaging: mvn package
    repository: https://github.com/ptgoetz/storm-signals.git
  </code></pre>
  
  <p>I ran it through a yaml parser but it says it's valid.</p>