Cleaning technical debt (#192)

* abstract Space component to switch out Map

* basic viewing possible

* restructure components dir

* all jsx --> js

* App.jsx --> App.js

* comment out 3d for now

src/components/atoms/Loading.js

@@ -0,0 +1,23 @@
+import React from "react";
+import copy from "../../common/data/copy.json";
+
+const LoadingOverlay = ({ isLoading, language }) => {
+  let classes = "loading-overlay";
+  classes += !isLoading ? " hidden" : "";
+
+  return (
+    <div id="loading-overlay" className={classes}>
+      <div className="loading-wrapper">
+        <span id="loading-text" className="text">
+          {copy[language].loading}
+        </span>
+        <div className="spinner">
+          <div className="double-bounce1" />
+          <div className="double-bounce2" />
+        </div>
+      </div>
+    </div>
+  );
+};
+
+export default LoadingOverlay;