Added focusContent() and focusTitle()

src/RichTextEditor.js

   //-------------------------------------------------------------------------------
   //--------------- Public API
 
+  focusTitle() {
+    this._sendAction(actions.focusTitle);
+  }wewe
+
+  focusContent() {
+    this._sendAction(actions.focusContent);
+  }
+
   registerToolbar(listener) {
     this.setState({
       listeners: [...this.state.listeners, listener]

src/WebviewMessageHandler.js

         case '${actions.setContentFocusHandler}':
           zss_editor.setContentFocusHandler();
           break;
+        case '${actions.focusContent}':
+          zss_editor.focusContent();
+          break;
+        case '${actions.focusTitle}':
+          zss_editor.focusTitle();
+          break;
       }
     };
   }

src/ZSSRichTextEditor/ZSSRichTextEditor.js

     WebViewBridge.send(JSON.stringify({type: 'SELECTION_CHANGE', data: {items}}))
 }
 
+zss_editor.focusContent = function() {
+    zss_editor.focusEditor('zss_editor_content');
+}
+
+zss_editor.focusTitle = function() {
+    zss_editor.focusEditor('zss_editor_title');
+}
+
 zss_editor.focusEditor = function(editorId) {
     
     // the following was taken from http://stackoverflow.com/questions/1125292/how-to-move-cursor-to-end-of-contenteditable-entity/3866442#3866442

src/const.js

   getContentHtml: 'GET_CONTENT_HTML',
   blurTitleEditor: 'BLUR_TITLE_EDITOR',
   blurContentEditor: 'BLUR_CONTENT_EDITOR',
+  focusTitle: 'FOCUS_TITLE',
+  focusContent: 'FOCUS_CONTENT',
 
   setBold: 'bold',
   setItalic: 'italic',