扩展插件完善优化

public/template/default/user/index_login.html

@@ -62,6 +62,7 @@
 								<div class="col-sm-3" style="text-align: right;"><a href="{:url('/user/index/forget')}" class="btn btn-link">忘记密码</a></div>
 							</div>
 						</form>
+						<div>{:hook('loginBottomAddon')}</div>
 					</div>
 				</div>
 			</section>