Move up analytics tag (#675)
Move up analytics tag (#675)

Please note we currently only use Google Analytics internally. We changed the
code to use async loading, so it makes more sense to have it happen earlier on
the page.
tensorflow/tensorboard,qiuminxu/tensorboard,francoisluus/tensorboard-supervise,francoisluus/tensorboard-supervise,francoisluus/tensorboard-supervise,tensorflow/tensorboard,qiuminxu/tensorboard,tensorflow/tensorboard,qiuminxu/tensorboard,qiuminxu/tensorboard,qiuminxu/tensorboard,francoisluus/tensorboard-supervise,tensorflow/tensorboard,francoisluus/tensorboard-supervise,tensorflow/tensorboard,francoisluus/tensorboard-supervise,qiuminxu/tensorboard,tensorflow/tensorboard,tensorflow/tensorboard