Created Installation (markdown)

Installation.md

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+# Installation
+
+1\. [Download](https://github.com/mikecao/flight/tarball/master) and extract the Flight framework files to your web directory.
+
+2\. Configure your webserver.
+
+For *Apache*, edit your .htaccess file with the following:
+
+    RewriteEngine On
+    RewriteCond %{REQUEST_FILENAME} !-f
+    RewriteCond %{REQUEST_FILENAME} !-d
+    RewriteRule ^(.*)$ index.php [QSA,L]
+
+For *Nginx*, add the following to your server declaration:
+
+    server {
+        location / {
+            try_files $uri $uri/ /index.php;
+        }
+    }
+
+3\. Create your index.php file.
+
+First include the framework.
+
+    require 'flight/Flight.php';
+
+Then define a route and assign a function to handle the request.
+
+    Flight::route('/', function(){
+        echo 'hello world!';
+    });
+
+Finally, start the framework.
+
+    Flight::start();