Added new Grav Remote for fetching details about latest version

system/src/Grav/Common/GPM/Remote/Grav.php

@@ -0,0 +1,55 @@
+<?php
+namespace Grav\Common\GPM\Remote;
+
+class Grav extends Collection
+{
+    private $repository = 'http://getgrav.org/downloads/grav.json';
+    private $data;
+
+    private $version;
+    private $date;
+
+    public function __construct($refresh = false, $callback = null)
+    {
+        parent::__construct($this->repository);
+
+        $this->fetch($refresh, $callback);
+        $this->data = json_decode($this->raw);
+
+        $this->version = @$this->data->version ?: '-';
+        $this->date = @$this->data->date ?: '-';
+
+        $this->data = $this->data->assets;
+
+        foreach ($this->data as $slug => $data) {
+            $this->items[$slug] = new Package($data);
+        }
+    }
+
+    /**
+     * Returns the list of assets associated to the latest version of Grav
+     * @return array list of assets
+     */
+    public function getAssets()
+    {
+        return $this->data;
+    }
+
+    /**
+     * Returns the latest version of Grav available remotely
+     * @return string
+     */
+    public function getVersion()
+    {
+        return $this->version;
+    }
+
+    /**
+     * Return the release date of the latest Grav
+     * @return string
+     */
+    public function getDate()
+    {
+        return $this->date;
+    }
+}