alpha version of requirement checker basic plugin info

https://trello.com/c/B7ovwoMv/2068-wp-loader

src/Plugin_Info.php

+<?php
+
+/**
+ * Structure with core info about plugin
+ * have to be compatible with PHP 5.2.x
+ */
+class WPDesk_Plugin_Info  {
+	/** @var string */
+	private $plugin_file_name;
+
+	/** @var string */
+	private $plugin_dir;
+
+	/** @var string */
+	private $class_name;
+
+	/** @var string */
+	private $version;
+
+	/** @var string */
+	private $product_id;
+
+	/** @var \DateTimeInterface */
+	private $release_date;
+
+	/**
+	 * @return string
+	 */
+	public function get_plugin_file_name() {
+		return $this->plugin_file_name;
+	}
+
+	/**
+	 * @param string $plugin_name
+	 */
+	public function set_plugin_file_name( $plugin_name ) {
+		$this->plugin_file_name = $plugin_name;
+	}
+
+	/**
+	 * @return string
+	 */
+	public function get_plugin_dir() {
+		return $this->plugin_dir;
+	}
+
+	/**
+	 * @param string $plugin_dir
+	 */
+	public function set_plugin_dir( $plugin_dir ) {
+		$this->plugin_dir = $plugin_dir;
+	}
+
+	/**
+	 * @return string
+	 */
+	public function get_version() {
+		return $this->version;
+	}
+
+	/**
+	 * @param string $version
+	 */
+	public function set_version( $version ) {
+		$this->version = $version;
+	}
+
+	/**
+	 * @return string
+	 */
+	public function get_product_id() {
+		return $this->product_id;
+	}
+
+	/**
+	 * @param string $product_id
+	 */
+	public function set_product_id( $product_id ) {
+		$this->product_id = $product_id;
+	}
+
+	/**
+	 * @return DateTimeInterface
+	 */
+	public function get_release_date() {
+		return $this->release_date;
+	}
+
+	/**
+	 * @param \DateTimeInterface $release_date
+	 */
+	public function set_release_date( $release_date ) {
+		$this->release_date = $release_date;
+	}
+
+	public function get_class_name() {
+		return $this->class_name;
+	}
+
+	/**
+	 * @param string $class_name
+	 */
+	public function set_class_name( $class_name ) {
+		$this->class_name = $class_name;
+	}
+
+	public function get_build_priority() {
+		return 0;
+	}
+
+	public function get_post_load_file() {
+	}
+
+
+}
\ No newline at end of file