After step 1 - Adding Composer config, adding Symfony autoloader (but not using it), adding initial simple script

http://fabien.potencier.org/article/50/create-your-own-framework-on-top-
of-the-symfony2-components-part-1
After Step 2, part 1 - Fixing some security issues.
After step 2, part 2 - Using request and response from the http-foundation component
After step 2, part 3 - Added examples of using request and response in comments
After step 3, part 1 - Removing commented examples, added second page, bye.php
After step 3, part 2 - Adding an include file for common header code
After step 3, part 3 - Changing to using a front controller, front.php, instead of include file (init.php).

“You are now in control of your website.” I updated bye.php as well,
even though it wasn’t in the instructions. To run either page, go to
“/front.php/hello” or “/front.php/bye”.
After step 3, part 4 - Using front controller, reorganizing files into folders.

This structure of this is slightly different than the example on
http://fabien.potencier.org/article/52/create-your-own-framework-on-top-
of-the-symfony2-components-part-3. We’re using the front controller in
the base directory instead of a /web directory because I couldn’t
figure out how to configure the .htaccess file to work with the
subfolder.
After step 3, part 5 - Converting pages over to templates