Modify all message enum data to use named struct values, not tuples (#479)

* Massively reorganize and clean up the whole Rust codebase

* Modify all message enum data to use named struct values, not tuples

graphene/src/document.rs

@@ -537,7 +537,7 @@ impl Document {
 					return Err(DocumentError::IndexOutOfBounds);
 				}
 			}
-			Operation::RenameLayer { path, name } => {
+			Operation::RenameLayer { layer_path: path, new_name: name } => {
 				self.layer_mut(path)?.name = Some(name.clone());
 				Some(vec![LayerChanged { path: path.clone() }])
 			}

graphene/src/operation.rs

@@ -71,8 +71,8 @@ pub enum Operation {
 		path: Vec<LayerId>,
 	},
 	RenameLayer {
-		path: Vec<LayerId>,
-		name: String,
+		layer_path: Vec<LayerId>,
+		new_name: String,
 	},
 	InsertLayer {
 		layer: Layer,