Fix for Context Menu unintentionally disabled by default. Also a documentation update

Author: dsgipe

README.md

@@ -435,8 +435,8 @@ Rather than applying props on the element yourself and to avoid your props being
   * onTouchEnd: event handler
   * onDoubleClick: event handler
   * onContextMenu: event handler
-  * style: inline object 
-  
+  * style: inline object
+
 
   \*\* _the given styles will only override the styles that are not a requirement for positioning the item. Other styles like `color`, `radius` and others_
 
@@ -1263,7 +1263,7 @@ $ yarn start
 
 Check http://0.0.0.0:8888/ in your browser and have fun!
 
-Please run `npm run lint` before you send a pull request. `npm run jest` runs the tests.
+Please run `npm run lint` before you send a pull request. `npm run test` runs the jest tests.
 
 <!--
 

src/lib/Timeline.js

@@ -411,7 +411,7 @@ export default class ReactCalendarTimeline extends Component {
         )
       )
     }
-    
+
     return derivedState
   }
 
@@ -821,7 +821,7 @@ export default class ReactCalendarTimeline extends Component {
         itemDrag={this.dragItem}
         itemDrop={this.dropItem}
         onItemDoubleClick={this.doubleClickItem}
-        onItemContextMenu={this.contextMenuClickItem}
+        onItemContextMenu={this.props.onItemContextMenu ? this.contextMenuClickItem : undefined}
         itemResizing={this.resizingItem}
         itemResized={this.resizedItem}
         itemRenderer={this.props.itemRenderer}
@@ -871,13 +871,13 @@ export default class ReactCalendarTimeline extends Component {
 
   /**
    * check if child of type TimelineHeader
-   * refer to for explanation https://github.com/gaearon/react-hot-loader#checking-element-types 
+   * refer to for explanation https://github.com/gaearon/react-hot-loader#checking-element-types
    */
   isTimelineHeader = (child) => {
     if(child.type === undefined) return false
     return child.type.secretKey ===TimelineHeaders.secretKey
   }
-  
+
   childrenWithProps(
     canvasTimeStart,
     canvasTimeEnd,