message: Add console debug messages for calculation watcher
  This is so the user can keep track of whether the calculation is still
  running or not...
diff: #include <QNetworkReply>
  #include <QTimer>
  +#include <QDebug>
  +
  namespace Avogadro {
  namespace QtPlugins {
  @@ -55,6 +57,8 @@ void CalculationWatcher::checkCalculation()
  new GirderRequest(m_networkManager.data(), url, m_girderToken);
  request->get();
  + qDebug() << "Checking calculation status...";
  +
  connect(request, &GirderRequest::result, this,
  &CalculationWatcher::finishCheckCalculation);
  connect(request, &GirderRequest::error, this,
  @@ -79,11 +83,14 @@ void CalculationWatcher::finishCheckCalculation(const QVariant& results)
  // We assume the calculation is done when the cjson is present
  QVariantMap cjson = results.toMap()["cjson"].toMap();
  if (cjson.isEmpty()) {
  + qDebug() << "Calculation still running. Trying again in 5 seconds...";
  // No results yet. Try again in 5 seconds.
  QTimer::singleShot(5000, this, &CalculationWatcher::checkCalculation);
  return;
  }
  + qDebug() << "Calculation is complete!";
  +
  QByteArray cjsonData =
  QJsonDocument::fromVariant(cjson).toJson(QJsonDocument::Compact);
  emit finished(cjsonData);
  