v1.2.0

New Models

• Reformer Implementation - https://arxiv.org/abs/2001.04451 Thanks Nikita Kitaev, @lukaszkaiser and @levskaya !

Colabs

• Reformer Colabs 9dbf863
• Transformer Colab d2c5b84

Framework Changes

• Ongoing cleanups and API simplifications.
• Optimization by @jekbradbury - thanks James!

PRs

• Consistent logging absl.logging and setup.py fixes thanks to @lkhphuc in #198
• Code cleanups by @cclauss in #196
• Code cleanup by @pkol in #134 - thanks!
• Bug fix by @pzielinski-nyc in #151 - thanks!