title: how to get magento table name
body: <p>I have this global config:</p>
  
  <pre><code>&lt;global&gt;
      &lt;models&gt;
      &lt;subscriber&gt;
          &lt;class&gt;Giftlab_Subscriber_Model&lt;/class&gt;
          &lt;resourceModel&gt;subscriber_resource&lt;/resourceModel&gt;
      &lt;/subscriber&gt;
      &lt;subscriber_resource&gt;
          &lt;class&gt;Giftlab_Subscriber_Model_Resource&lt;/class&gt;
          &lt;entities&gt;
              &lt;records&gt;
                  &lt;table&gt;subscriber_records&lt;/table&gt;
              &lt;/records&gt;
          &lt;/entities&gt;
      &lt;/subscriber_resource&gt;
      &lt;/models&gt;
      &lt;resources&gt;
          &lt;giftlab_subscriber_write&gt;
              &lt;connection&gt;
                  &lt;use&gt;core_write&lt;/use&gt;
              &lt;/connection&gt;
          &lt;/giftlab_subscriber_write&gt;
          &lt;giftlab_subscriber_read&gt;
              &lt;connection&gt;
                  &lt;use&gt;core_read&lt;/use&gt;
              &lt;/connection&gt;
          &lt;/giftlab_subscriber_read&gt;
          &lt;giftlab_subscriber_setup&gt;
              &lt;setup&gt;
                  &lt;module&gt;Giftlab_Subscriber&lt;/module&gt;
                  &lt;class&gt;Giftlab_Subscriber_Model_Resource_Setup&lt;/class&gt;
              &lt;/setup&gt;
              &lt;connection&gt;
                  &lt;use&gt;core_setup&lt;/use&gt;
              &lt;/connection&gt;
          &lt;/giftlab_subscriber_setup&gt;
      &lt;/resources&gt;
  &lt;/global&gt;
  </code></pre>
  
  <p>in my mysql4-install-0.1.0.php file, I need to get the table name. How do I do it?
  I know it is something like this:</p>
  
  <pre><code>$this-&gt;getTable('subscriber_resource/records')
  </code></pre>
  
  <p>But that only produces an exception <code>Can't retrieve entity config: subscriber_resource/records</code>. What do I need to do to retrieve the table name?</p>