0.50.0

• Improve image sizes (backported to 0.23.0 due to build issues)
• Improved provisioning system with new python wrapper
• Modularized apache and nginx configuration
• Dockerfile are now generated via jinja2 files
• webdevops/storage is now using busybox
• Latest tag is now ubuntu 16.04
• Set clear_env to no for php-fpm (if possible)
• Added ubuntu 16.04 images (eg. php, hhvm)
• Added webdevops/php-dev webdevops/php-apache-dev webdevops/php-nginx-dev (xdebug and disabled caching for webserver)
• Added webdevops/varnish
• Added mod_expire for webdevops/apache