Fix bugs, improve perfs and use SimpleLogger instead of Monolog

app/Core/MemoryCache.php

@@ -0,0 +1,32 @@
+<?php
+
+namespace Core;
+
+class MemoryCache extends Cache
+{
+    private $storage = array();
+
+    public function init()
+    {
+    }
+
+    public function set($key, $value)
+    {
+        $this->storage[$key] = $value;
+    }
+
+    public function get($key)
+    {
+        return isset($this->storage[$key]) ? $this->storage[$key] : null;
+    }
+
+    public function flush()
+    {
+        $this->storage = array();
+    }
+
+    public function remove($key)
+    {
+        unset($this->storage[$key]);
+    }
+}