Expose the grunt.log and grunt.fail objects to BehatTask to allow differentiated log messages and fail actions.
Removing extraneous output on test fail.
Updating tests for BehatTask.js to reflect logging and fail changes.
Allowing environment variables for Behat to be passed through task config options.
Adding example of the env config option to README.md.
Merge pull request #6 from arithmetric/feature/differentiate_logs

Differentiate success, fail, and log messages
Merge pull request #7 from arithmetric/feature/env_var_config

Allowing config of environment variables for Behat
Moving debug output before handling of task completion to ensure output is displayed in case of errors and to serve as context prior to the success statement.