Merge pull request tensorflow#620 from rsepassi/push

v1.5.3

Merge pull request tensorflow#593 from rsepassi/push

v1.5.2

Merge pull request tensorflow#577 from rsepassi/push

v1.5.1

Merge pull request tensorflow#576 from rsepassi/push

v1.5.0

Merge pull request tensorflow#570 from rsepassi/push

v1.4.4

Merge pull request tensorflow#552 from rsepassi/push

v1.4.3

Merge pull request tensorflow#506 from rsepassi/push

v1.4.2

Merge pull request tensorflow#484 from rsepassi/push

v1.4.1

Merge pull request tensorflow#482 from rsepassi/push

v1.4

Merge pull request tensorflow#456 from lukaszkaiser/push

1.3.2 (small changes for colab)