ScenarioStepProgressFormatter
Merge branch 'progress3' of https://github.com/roignac/behave into roignac-progress3
ScenarioStepProgressFormatter:
* Simplified, now derived from StepProgressFormatter.
* Changed output slightly.
* Added handling when scenario.name is empty
* Added new-line after each feature
Merge pull-request #168: New progress3 formatter, provided by roignac