- Added a new Email defintion (which will soon see it's components changed)

- Added a new post-install script for composer which adds a project skeleton "ready to use".
- Error 500 are now handled properly in production; waiting to see if adjustements will be required before adding other code pages.

src/Lean.php

@@ -107,6 +107,7 @@ class Lean
         $path = dirname(__DIR__) . "/meta/definitions/";
 
         return array_merge(
+            require($path . "email.php"),
             require($path . "http.php"),
             require($path . "language.php"),
             require($path . "routes.php"),