release v0.0.17

Update setup.py

release v0.0.16

fix trivial bug

release v0.0.15

Update setup.py

release v0.0.14

1. 在下载文件不完整时，抛出异常

Rlease v0.0.13

1. 允许自定义园区的传入，以支持更多的园区，例如在使用广州三水时，可以传入 region="gzs"
2. 更新版本号

release v0.0.12

Update setup.py

bug fix about downloading feature

v0.0.11

release new version

Fix signature of downloading

v0.0.10

Update cos_auth.py

alpha release for spg region

Support more regions (#19)

* suppport singapore region

fix bug

v0.0.8

Update and rename CHANGES to CHANGES.rst