- Added the application feature - a big reason why Lean was created in the first place.

- Began moving some repetitive parts from projects to projects into lean

meta/definitions/http.php

@@ -0,0 +1,19 @@
+<?php
+
+use function DI\autowire, DI\create, DI\get;
+
+use Psr\Http\Message\ServerRequestInterface;
+
+use Zend\Diactoros\ServerRequestFactory;
+use Zend\HttpHandlerRunner\Emitter\EmitterInterface,
+    Zend\HttpHandlerRunner\Emitter\SapiEmitter;
+
+return [
+    ServerRequestInterface::class => function ($c) {
+        return ServerRequestFactory::fromGlobals(
+            $_SERVER, $_GET, $_POST, $_COOKIE, $_FILES
+        );
+    },
+
+    EmitterInterface::class => create(SapiEmitter::class),
+];