Added first version of Dialogue tree/graph system, includes DOT output
Working on making dialogue graphs more sensible
Dialogue system example built on top of event listener system
Dialogue system now semi-responsive, need to test more edge-cases and implement the conditional AST answer system
Mocked AST Visitor for attribute checks. Not type-safe, but works
Found flaw in AST visitor, fix TBD due to c sharp syntax
Fixed type safety in ASTs
Split AST classes into separate files and namespaces
Merge branch 'master' into dialogue_system
Merged in Dialogue system branch