Adds slim/views 0.* to composer.json
Updates to new Slim\Views Twig and TwigExtension
Merge pull request #3 from jeremykendall/slim-2.3-compatible

Updates Slim-Skeleton to be compatible with Slim 2.3
Adds composer.lock to .gitignore
Changes log level, updates .gitignore

Log level has been changed back to ERROR. I mistakenly changed it to
DEBUG in #3.

Adds composer.lock to .gitignore
Updates README, adds contribution section.
Corrects typo in README.md