added lang

lang/zh-cn/zh-cn.js

 KityMinder.LANG[ 'zh-cn' ] = {
+    'maintopic': '中心主题',
+    'topic': '分支主题',
     'tooltips': {
         'undo': '撤销',
         'redo': '重做',

src/core/minder.js

@@ -39,7 +39,7 @@ var Minder = KityMinder.Minder = kity.createClass( "KityMinder", {
 
         this._addRenderContainer();
 
-        this._root = new MinderNode( "Main Topic" );
+        this._root = new MinderNode( this.getLang().maintopic );
         this._root.setType( "root" );
         if ( this._options.renderTo ) {
             this.renderTo( this._options.renderTo );

src/core/minder.module.js

@@ -38,12 +38,12 @@ kity.extendClass( Minder, {
                 }
             }
 
-            if(moduleDeals.defaultOptions){
-                this.setDefaultOptions(moduleDeals.defaultOptions);
+            if ( moduleDeals.defaultOptions ) {
+                this.setDefaultOptions( moduleDeals.defaultOptions );
             }
             //添加模块的快捷键
-            if(moduleDeals.addShortcutKeys){
-                this.addShortcutKeys(moduleDeals.addShortcutKeys)
+            if ( moduleDeals.addShortcutKeys ) {
+                this.addShortcutKeys( moduleDeals.addShortcutKeys )
             }
 
         }

src/module/keyboard.js

@@ -87,11 +87,11 @@ KityMinder.registerModule( "KeyboardModule", function () {
                 }
                 switch ( e.originEvent.keyCode ) {
                 case keys.Enter:
-                    this.execCommand( 'appendSiblingNode', new MinderNode( 'Topic' ) );
+                    this.execCommand( 'appendSiblingNode', new MinderNode( this.getLang().topic ) );
                     e.preventDefault();
                     break;
                 case keys.Tab:
-                    this.execCommand( 'appendChildNode', new MinderNode( 'Topic' ) );
+                    this.execCommand( 'appendChildNode', new MinderNode( this.getLang().topic ) );
                     e.preventDefault();
                     break;
                 case keys.Backspace: