title: slf4j error with Htmlunit Maven dependency
body: <p>With the following Maven dependency for Htmlunit,</p>
  
  <pre class="lang-xml prettyprint-override"><code>&lt;dependency&gt;
      &lt;groupId&gt;net.sourceforge.htmlunit&lt;/groupId&gt;
      &lt;artifactId&gt;htmlunit&lt;/artifactId&gt;
      &lt;version&gt;2.18&lt;/version&gt;
  &lt;/dependency&gt; 
  </code></pre>
  
  <p>I am getting the following error, </p>
  
  <pre><code>SLF4J: Class path contains multiple SLF4J bindings.
  SLF4J: Found binding in [jar:file:/home/mnkb/.m2/repository/ch/qos/logback/logback-classic/1.1.3/logback-classic-1.1.3.jar!/org/slf4j/impl/StaticLoggerBinder.class]
  SLF4J: Found binding in [jar:file:/home/mnkb/.m2/repository/org/apache/activemq/activemq-all/5.12.0/activemq-all-5.12.0.jar!/org/slf4j/impl/StaticLoggerBinder.class]
  SLF4J: See http://www.slf4j.org/codes.html#multiple_bindings for an explanation.
  SLF4J: Actual binding is of type [ch.qos.logback.classic.util.ContextSelectorStaticBinder]
  </code></pre>
  
  <p>In my pom.xml, I have even commented out the following dependency,</p>
  
  <pre class="lang-xml prettyprint-override"><code>&lt;!-- &lt;dependency&gt;
              &lt;groupId&gt;com.mattbertolini&lt;/groupId&gt;
              &lt;artifactId&gt;liquibase-slf4j&lt;/artifactId&gt;
              &lt;version&gt;${liquibase-slf4j.version}&lt;/version&gt;
          &lt;/dependency&gt; --&gt;
  </code></pre>