title: onEndReached fire again and again when ListView nested in ScrollView
body: <pre><code> render() {
      return (
        &lt;ScrollView style={styles.scroll_style}&gt;
          {this._renderStoreInfo()}
          {this._renderOperatesView()}
          &lt;View style={styles.space}/&gt;
          &lt;ListView
            contentContainerStyle={styles.list}
            dataSource={this.state.dataSource}
            renderRow={(rowData, sectionID, rowID) =&gt; this._renderRow(rowData, rowID)}
            renderFooter={this._renderFooter.bind(this)}
            onEndReached={this._onEndReached.bind(this)}
            onEndReachedThreshold={10} /&gt;
        &lt;/ScrollView&gt;
      );
    }
  </code></pre>
  
  <p>the onEndReached fired again and again as soon as it was mounted. but I do not scroll(pull up) the listview.</p>