fix typo

src/components/ElementGroup.js

 import React from 'react'
 import Element from './Element'
 import ReactAddonsUpdate from 'react-addons-update'
+import autoBind from 'react-autobind'
 
 export default class ElementGroup extends React.Component {
   constructor(props){
@@ -12,9 +13,7 @@ export default class ElementGroup extends React.Component {
         { id: 3, name: "药架格", initialPos: {x: 80, y: 70 + 60 * 2}, target_type: 'RegionalDesign::DrugBrandreth' }
       ]
     };
-    this.cloneElement = this.cloneElement.bind(this);
-    this.deleteElement = this.deleteElement.bind(this);
-    this.deleteLastElement = this.deleteLastElement.bind(this);
+    autoBind(this);
   }
 
   cloneElement(element) {

src/components/Header.js

@@ -3,6 +3,7 @@ import ModalRepoForm from './ModalRepoForm'
 import ReactAddonsUpdate from 'react-addons-update'
 import Loader from 'halogen/PulseLoader'
 import { Link } from 'react-router-dom'
+import autoBind from 'react-autobind'
 
 export default class Header extends React.Component {
   constructor(props){
@@ -10,7 +11,7 @@ export default class Header extends React.Component {
     this.state = {
       data: null, loading: true, error: null
     };
-    this.addRepo = this.addRepo.bind(this);
+    autoBind(this);
   }
 
   componentDidMount() {

src/components/ModalRepoForm.js

@@ -3,6 +3,7 @@ import { Modal, Button } from 'react-bootstrap'
 import { Form, FormGroup, Col, FormControl, ControlLabel } from 'react-bootstrap'
 import EventEmitter from '../libs/eventEmitter'
 import $ from 'jquery'
+import autoBind from 'react-autobind'
 
 export default class ModalRepoForm extends React.Component {
   constructor(props){
@@ -10,11 +11,7 @@ export default class ModalRepoForm extends React.Component {
     this.state = {
       showModal: false, name: ''
     };
-    this.init_state = this.state;
-    this.close = this.close.bind(this);
-    this.open = this.open.bind(this);
-    this.handleChange = this.handleChange.bind(this);
-    this.save = this.save.bind(this);
+    autoBind(this);
   }
 
   close() {

src/components/RegionalDesign.js

@@ -4,6 +4,7 @@ import Element from './Element'
 import ReactAddonsUpdate from 'react-addons-update'
 import EventEmitter from '../libs/eventEmitter'
 import $ from 'jquery'
+import autoBind from 'react-autobind'
 
 export default class RegionalDesign extends React.Component {
   constructor(props){
@@ -11,10 +12,7 @@ export default class RegionalDesign extends React.Component {
     this.state = {
       data: null, loading: true, error: null, object_name: '', object_type: '', children_object_type: ''
     };
-    this.init_state = this.state;
-    this.addElement = this.addElement.bind(this);
-    this.updateElement = this.updateElement.bind(this);
-    this.addElement = this.addElement.bind(this);
+    autoBind(this);
   }
 
   getConfig(props, key) {