Implemented an abstract syntax tree

src/build/token/Token.go

@@ -6,9 +6,9 @@ import "fmt"
 // The characters that make up an identifier are grouped into a single token.
 // This makes parsing easier and allows us to do better syntax checks.
 type Token struct {
-	Kind     Kind
-	Position int
 	Bytes    []byte
+	Position int
+	Kind     Kind
 }
 
 // End returns the position after the token.