1. FIXED: Context node would sometimes have multiple links to an outer endogenous node.
2. ADDED: Nodes in the causal graph now have human-readable labels.
3. ADDED: Directionality of edges in causal graph.
4. ADDED: Show human-readable descirptions in Web UI.
5. ADDED: Show context in Web UI.
6. ADDED: Show causes in Web UI.
7. ADDED: Boddy/Suzy/bottle example.
8. DEBUG: Added debug tools that shows the causal entailments.