Add view classes

src/nodes/StringNode.ts

@@ -1,6 +1,7 @@
 import { AbstractNode, NodeMods } from './AbstractNode'
 import { Path } from '../model/Path'
 import { DataModel } from '../model/DataModel'
+import { TreeView } from '../view/TreeView'
 
 export class StringNode extends AbstractNode<string> {
   constructor(mods?: NodeMods<string>) {
@@ -10,8 +11,8 @@ export class StringNode extends AbstractNode<string> {
   updateModel(el: Element, path: Path, model: DataModel) {
   }
 
-  render(path: Path, value: string, model: DataModel) {
-    return this.wrap(path, model, 
+  render(path: Path, value: string, view: TreeView) {
+    return this.wrap(path, view,
       `<span>${path.last()}</span> <input value="${value || ''}"></input>`)
   }
 }