init sdk-v5
Merge pull request #56 from wangjinlei/feature/add_new_sdk

init sdk-v5
fix travisci
Merge pull request #57 from wangjinlei/feature/fix_travisci

fix travisci
first commit
first commit
add listprefix
update docs
update docs
update docs
io.putFile
update
Merge pull request #1 from wangtuanjie/feature/update_docs_to_v6

Feature/update docs to v6
test
update docs fisrt
merge
add docs
update changelog
update docs and code
merge from qiniu/develop