Was referencing outdated $this->context settings
instead of parent context. Still a bit hacky to make
assumptions on parent context, but its difficult to pass
through arguments to subcontexts.
- Moved all extension-specific conf into its own configuration namespace
- Described configuration via PHP, and added default values
- Removed boilerplate config from README
- Made screenshot_path optional
- Configurable ajax_timeout settings
Note: The DI system plus the initializer+context combo requires insane amounts of code duplication,
will need to be looked at more closely (very little docs on that level of Behat extension available).
