Copy the library in your theme folder, then in functions.php

require_once('pixelentity-theme-bundled-plugins/class-pixelentity-theme-bundled-plugins.php');
PixelentityThemeBundledPlugins::init(
	array(
		array(
			'slug' => 'pe-theme-framework',
			'name' => 'Pixelentity Theme Framework Plugin',
			'version' => '1.1.0',
			'download_link' => get_template_directory_uri().'/plugins/pe-theme-framework.zip'
		),
		array(
			'slug' => 'pe-theme-framework2',
			'name' => 'Pixelentity Theme Framework Plugin 2',
			'version' => '1.1.0',
			'download_link' => get_template_directory_uri().'/plugins/pe-theme-framework2.zip'
		),
		array(
			'slug' => 'pe-theme-framework3',
			'name' => 'Pixelentity Theme Framework Plugin 3',
			'version' => '1.1.0',
			'download_link' => get_template_directory_uri().'/plugins/pe-theme-framework3.zip'
		),
		// revolution slider (requires no original zip modification)
		array(
			'slug' => 'http://www.themepunch.com/revolution/',
			'name' => 'Revolution Slider',
			'version' => '4.6.5',
			'download_link' => get_template_directory_uri().'/plugins/revslider_v4.6.5.zip',
		),
	)
);

To display table of plugins, Somewhere in your theme options page, use:

echo PixelentityThemeBundledPlugins::$instance->options();

Since plugin zips files are hosted inside theme folder, "PluginURI" in plugin header must match the "slug" used upon inited, example:

<?php
/*
  Plugin Name: Pixelentity Framework Theme Plugin
  Plugin URI: pe-theme-framework
  Description: Provides advanced features to theme based on the Pixelentity Theme Framework
  Version: 1.1.0
  Author: pixelentity
  Author URI: http://pixelentity.com
  License: GPL2
*/
?>