Merge tag '1.5.1' into develop

Release v1.5.1

CHANGELOG.md

@@ -1,5 +1,5 @@
 # v1.5.1
-## mm/dd/2018
+## 08/23/2018
 
 1. [](#new)
     * Added static `Grav\Common\Yaml` class which should be used instead of `Symfony\Component\Yaml\Yaml`

system/defines.php

@@ -8,7 +8,7 @@
 
 // Some standard defines
 define('GRAV', true);
-define('GRAV_VERSION', '1.5.0');
+define('GRAV_VERSION', '1.5.1');
 define('GRAV_TESTING', false);
 define('DS', '/');