Renamed ActionExpression to RulesAction and ConditionExpression to RulesCondition.
Converted all ActionInterface instances to RulesActionInterface.
Merge pull request #50 from klausi/action-context

Covert all ActionInterface instances to RulesActionInterface.
Fixing unit tests.
Clean up the documentation blocks.
Merge pull request #60 from bartfeenstra/8.x-3.x

Clean up the documentation blocks.