Merge pull request #139 from mozilla/feature/disable-sentry-in-development

Enable sentry in prod

src/telemetry.js

 import Raven from "raven-js";
 
 export default function registerTelemetry() {
-  Raven.config("https://f571beaf5cee4e3085e0bf436f3eb158@sentry.io/256771").install();
+  if (process.env.NODE_ENV === "production") {
+    Raven.config("https://f571beaf5cee4e3085e0bf436f3eb158@sentry.io/256771").install();
+  }
 }