* Add file client to image io
* Fix petrel_client imwrite error
* Add examples to the docstring and delete the file check of imread
* modify docstring v1.3.19->v1.4.1
* Deprecate auto_mkdir parameter and complete test_io.py
* Fix error caused by deleting the mock package in test_io.py
* Add annotation to imencode
* modify imread input assert and delete the judgement of file client 'put' method
* Delete try except in imwrite.
* Add a error file extension unit test.
* Support image reading while ignoring EXIF orientation info
Add unit test for ignore_orientation flags in imread()
* add documentation for imread
* Add test cases