Adding Docblocks throughout the project and lowering the missing docblock limit in phpci.yml to zero.

Closes #692

PHPCI/Helper/Github.php

@@ -13,8 +13,18 @@ use b8\Cache;
 use b8\Config;
 use b8\HttpClient;
 
+/**
+ * The Github Helper class provides some Github API call functionality.
+ * @package PHPCI\Helper
+ */
 class Github
 {
+    /**
+     * Make a request to the Github API.
+     * @param $url
+     * @param $params
+     * @return mixed
+     */
     public function makeRequest($url, $params)
     {
         $http = new HttpClient('https://api.github.com');