Adding info about how to contribute to the project
Forwarding outline tokens to chained steps

When running scenario outlines the examples data
were not passed to the chained steps, this resulted
in unexpected exceptions when outputs formatters
processes them.
Merge pull request #9 from rajeshtaneja/wip-mdl-44262-m25

Forwarding outline tokens to chained steps
MDL-45701 behat: Fixed symfony to use fixed version