add analytics page for tests conducted

- add robot.txt entry
  - fix graph render with new set of actions

src/components/AbsorbanceGraph.js

@@ -11,7 +11,7 @@ class AbsorbanceGraph extends Component {
         this.state = { url: this.props.url, show: this.props.show };
     }
     componentDidMount() {
-        this.drawChart(this.props.url);
+        this.drawChart(this.state.url);
     }
 
     drawChart(url) {
@@ -51,7 +51,9 @@ class AbsorbanceGraph extends Component {
             .then(response => response.data.text())
             .then((text) => {
                 const testData = d3.csvParse(text.replaceAll('"', '')).filter(x => {
-                    if (x.NM > 350 && x.NM < 600 && x.CA !== "-Infinity" && x.CA !== "Infinity") return x;
+                    if (x.NM > 350 && x.NM < 600 
+                        && x.CA !== "-Infinity" && x.CA !== "Infinity"
+                        && !isNaN(x.CA)) return x;
                 });
 
                 const options = {