bug fix
Merge pull request #68 from coaku/feature/b_xzk_fix_httplib_chunk

bug fix
update version for pypi
update version
Merge pull request #69 from coaku/feature/b_xzk_update_version

update version for pypi
add warning of utf8 keys
Merge pull request #71 from longshanksmo/develop

add warning of utf8 keys
Merge pull request #72 from qiniu/develop

add warning of utf8 keys