Dialogs and function for new terrain.

tilorswift/js/events/TilorswiftEvent.js

@@ -11,6 +11,8 @@ const TilorswiftEvent = {
     ADD_ROWS_CLICKED: 'addRowsClicked',
     ADD_COLUMNS: 'addColumns',
     ADD_COLUMNS_CLICKED: 'addColumnsClicked',
+    NEW_TERRAIN: 'newTerrain',
+    NEW_TERRAIN_CLICKED: 'newTerrainClicked',
 };
 
 export default TilorswiftEvent;