Adding type values to node extensions

These will be useful later

src/js/parser/javascript/match.js

@@ -2,4 +2,5 @@ import _ from 'lodash';
 import Base from './base.js';
 
 export default _.extend({}, Base, {
+  type: 'match',
 });

src/js/parser/javascript/regexp.js

@@ -2,6 +2,8 @@ import _ from 'lodash';
 import Base from './base.js';
 
 export default _.extend({}, Base, {
+  type: 'regexp',
+
   render(container) {
     this.container = container;
     this.contents = _.map(this.matches(), match => {

src/js/parser/javascript/root.js

@@ -2,6 +2,8 @@ import _ from 'lodash';
 import Base from './base.js';
 
 export default _.extend({}, Base, {
+  type: 'root',
+
   render(container) {
     this.contents = container.group();