Merge pull request qiniu#308 from jemygraw/master

add new putpolicy parameter and update changelog

Merge pull request qiniu#265 from jemygraw/master

7.2.4;changelog;update version

Merge pull request qiniu#251 from sxci/7.2.3

7.2.3; changelog; autozonebuckettest

Merge pull request qiniu#238 from longbai/upload_stream

add stream upload

Merge pull request qiniu#235 from longbai/fixed_pili_streaming_expire

fixed streaming expired

Merge pull request qiniu#234 from longbai/v8

update autozone

Merge pull request qiniu#229 from liuchengjason/add_force

Add force

[ci skip]fixed change log

[ci skip] changelog

[ci skip] changelog