Added new evaluator. Still a work in progress.
Generalised define/set/new actions
Added evaluation of definitions and actions
Fixed definition evaluation
Added 'set' and 'new' actions
Fixed lexer/parser indentation error
Fixed token stream duplication in evaluator
Removed type checking and simplified action definitions
Vastly simplified the dynagram grammar.

There is now no control flow, only actions.
That is, any piece of control flow can be described as an action.
Added action definition