Prepare for 2.2.1 release (tensorlayer#1058)

* prepare for 2.2.1 release

* Fix test.

version 2.2.0

Update package_info.py

Update CHANGELOG.md

minor spelling and typo fixes (tensorlayer#971)

* minor spelling and typo fixes

* Add  Github and PR ID to the changelog.md

Merge pull request tensorlayer#952 from zsdonghao/master

TensorLayer 2.0.0-alpha Release

release 1.11.1 (tensorlayer#888)

* release 1.11.1

release 1.11.0 (tensorlayer#871)

Release1.11 (tensorlayer#867)

* support data_format='channels_first' in BatchNormLayer

* don't use tf.nn.bias_add

* fix typo

* rename images

* update changelog

* add some explaination for affine transformation

* fix

* update version

* update readme

* only cache $HOME/.cache/pip/wheels

Release TL 1.10.1 (tensorlayer#825)

* Release 1.10.1

* Pin imageio to latest version 2.4.0

* Pin pytest to latest version 3.8.0

* Update requirements_test.txt

* Update requirements.txt

* Update CHANGELOG.md

* Changelog Updated

* Travis Updated

* support channel_first

* YAPF Applied

* YAPF Corrections Applied

* YAPF Corrections

* Changelog cleaned