New Features

• Blocking metadata flag
• Gherkin lint task
• Gulp task
• Phing task
• Ant task
• Make task
• Robo task
• Shell task

Improvements

• Added support for grumphp.yml.dist files.
• Don't force usage of PSR2 in the Phpcs task.
• Fixed PhpCsFixer task name.

BC breaks

• Every task has to return a TaskResult!
• TaskRunner and Tasks should not throw FailureException on task failure anymore.
• Changed default of ignore_unstaged_changes to false.
• Codeception fail-fast paramter renamed to fail_fast.