Remove heatmap, add diffexp info to histograms (#339)

* Create Release_Validation_Recipe.md

* compose middle ware for redux devtools

* update package.json and lock

* remove heatmap, add to left side bar

* redux devtools extension

client/src/components/continuous/continuous.js

@@ -37,8 +37,6 @@ class Continuous extends React.Component {
     };
   }
 
-  componentDidUpdate() {}
-
   render() {
     const { ranges, obsAnnotations, schema } = this.props;
     if (schema && !this.continuousChecked) {