how to add my custom template of heatbeat
I had the same problem and what you should do is replace 

/**
 * Implement hook_ctools_plugin_api().
 *
 * This hook is needed to let ctools know about exportables.
 * @see heartbeat_og_ctools_plugin_api
 */
function love_ctools_plugin_api($module, $api) {
  if ($module == 'love' &amp;&amp; $api == 'love') {
    return array('version' =&gt; 1);
  }
}


by 

/**
 * Implement hook_ctools_plugin_api().
 *
 * This hook is needed to let ctools know about exportables.
 * @see heartbeat_og_ctools_plugin_api
 */
function love_ctools_plugin_api($module, $api) {
  if ($module == 'heartbeat' &amp;&amp; $api == 'heartbeat') {
    return array('version' =&gt; 1);
  }
}


and after a cache flush, it should appear in heartbeat templates