Revert "Update required version of html5lib to 1.0b10 (#589)" (#604)
Revert "Update required version of html5lib to 1.0b10 (#589)" (#604)

This reverts commit 46c153f993b126f0ba9e599229ecfee440c8393c.
francoisluus/tensorboard-supervise,francoisluus/tensorboard-supervise,francoisluus/tensorboard-supervise,tensorflow/tensorboard,francoisluus/tensorboard-supervise,qiuminxu/tensorboard,qiuminxu/tensorboard,tensorflow/tensorboard,tensorflow/tensorboard,tensorflow/tensorboard,qiuminxu/tensorboard,tensorflow/tensorboard,tensorflow/tensorboard,qiuminxu/tensorboard,francoisluus/tensorboard-supervise,qiuminxu/tensorboard,qiuminxu/tensorboard,tensorflow/tensorboard,francoisluus/tensorboard-supervise