ADD: http api exceptions implementation

~dev_rating/application/classes/HTTP/API/Exception.php

+<?php defined('SYSPATH') or die('No direct script access.');
+
+class HTTP_API_Exception extends HTTP_Exception
+{
+    /**
+     * Creates an HTTP_Exception of the specified type.
+     *
+     * @param   integer $code the http status code
+     * @param   string $message status message, custom content to display with error
+     * @param   array $variables translation variables
+     * @return  HTTP_Exception
+     */
+    public static function factory($code, $message = NULL, array $variables = NULL, Exception $previous = NULL) {
+        $class = 'HTTP_API_Exception_' . $code;
+        return new $class($message, $variables, $previous);
+    }
+
+    public function get_response() {
+        // Lets log the Exception, Just in case it's important!
+        Kohana_Exception::log($this);
+
+        $twig = Twig::factory('errors/http_api');
+
+        $twig->code = $this->getCode();
+        $twig->message = $this->getMessage();
+        $twig->link = URL::site('');
+        $response = Response::factory()
+            ->status($this->getCode())
+            ->body($twig);
+
+        return $response;
+    }
+}
\ No newline at end of file

~dev_rating/application/views/errors/http.twig

@@ -18,7 +18,6 @@
         <div class="logotype alignLeft">
             {{ HTML.anchor('/', System.Title, {'title': 'Перейти на главную'})|raw }}
         </div>
-        <div class="faculty alignLeft">{{ User.FacultyName }}</div>
         <div class="navigation">
             Ooops!
         </div>

~dev_rating/application/views/errors/http_api.twig

+{
+    "code": "{{ code }}",
+    "message": "{{ message }}"
+}
\ No newline at end of file

~dev_rating/system/classes/HTTP/API/Exception/400.php

+<?php defined('SYSPATH') OR die('No direct script access.');
+
+class HTTP_API_Exception_400 extends HTTP_API_Exception {
+    protected $_code = 400;
+}