Moved back context class arguments to suite parameters section
Refactored (simplified) `ContextEnvironmentHandler` methods
Refactored context arguments resolving
Moved context creation and initialization into the ContextFactory
ContextFactory supports both named and indexed constructor arguments
Fixed wrong spacing in traits.feature
Fixed bug introduced with contexts creation refactoring
Removed debugging line from config_inheritance.feature
Merge pull request #446 from Behat/optimization/context-arguments

Context arguments handling refactoring