Repository cleanup #40 (#41)

* added base classes for repositories and queries #40
* prepared controller and repositories to use fetchByQuery() #40
* removed findAll() which has added pagination to the original doctrine method #40

src/AppBundle/Repository/Query/VisibilityInterface.php

@@ -0,0 +1,24 @@
+<?php
+
+/*
+ * This file is part of the Kimai package.
+ *
+ * (c) Kevin Papst <kevin@kevinpapst.de>
+ *
+ * For the full copyright and license information, please view the LICENSE
+ * file that was distributed with this source code.
+ */
+
+namespace AppBundle\Repository\Query;
+
+/**
+ * Can be used for advanced queries with the: UserRepository
+ *
+ * @author Kevin Papst <kevin@kevinpapst.de>
+ */
+interface VisibilityInterface
+{
+    const SHOW_VISIBLE = 1;
+    const SHOW_HIDDEN = 0;
+    const SHOW_BOTH = 2;
+}