Remove Slim 1.x
Add Slim 2.4.2
Minor PSR-2 format fiix.
Update to latest Twig view for Slim

Note that it's modified from the original by removing the Slim\Views namespace and renaming the class to TwigView.
Add Slim's autoloader
Slim is now within the Slim namespace.
Merge branch 'akrabat-update-slim'