fix(demo): Log demo errors to the console (#68)

When a "request fails" in the demo, sometimes it is because of an exception elsewhere in the process.  This logs those errors to the console so that they can be traced and fixed.

demo/query.js

@@ -53,6 +53,7 @@ document.addEventListener('DOMContentLoaded', () => {
       window.results.textContent =
           formatObjectToString(mksa.getConfiguration());
     } catch (error) {
+      console.log(error);
       window.results.textContent = formatObjectToString({error: error.message});
     }
   });  // emeRun click listener
@@ -113,6 +114,7 @@ document.addEventListener('DOMContentLoaded', () => {
             formatObjectToString(mksa.getConfiguration());
       }
     } catch (error) {
+      console.log(error);
       window.results.textContent = formatObjectToString({error: error.message});
     }
   });  // mcRun click listener