Release version 3.1.0

This minor release introduce a new parameter `EmailInterface` to the
hook `substituteMarkersHook`.

Author: PowerKiKi

ext_emconf.php

@@ -5,7 +5,7 @@
     'description' => 'Send any pages as Newsletter and provide statistics on opened emails and clicked links.',
     'category' => 'module',
     'shy' => 0,
-    'version' => '3.0.2',
+    'version' => '3.1.0',
     'dependencies' => '',
     'conflicts' => '',
     'priority' => '',