- add NodeActor
- add NodeListActor
- add AccessibilityActor
- add AccessibleWalkerActor
- add AccessibleActor
- add ParentAccessibilityActor
- add SimulatorActor
- add PerformanceActor
- add missing tests for WalkerActor
- refactor README Development section and dev/ directory
- add profile manager CLI tool to dev/profile.py