Merge pull request #84 from qiniu/master

uptoken
add Qiniu_Free, and replace the satify free with Qiniu_Free
Merge pull request #85 from carter2000/feature/b_jwl_add_Qiniu_Free

add Qiniu_Free, and replace the satify free with Qiniu_Free
Update CHANGELOG.md
Merge pull request #87 from qiniu/develop

Release v6.1.0