add some descriptions
fix
Update image-process.markdown
remove describe of callback accesstoken
Merge pull request #37 from longshanksmo/fix/rm_callback_auth

remove describe of callback accesstoken
Merge pull request #36 from SunRunAway/patch-1

Update image-process.markdown
description modify
Merge pull request #35 from coaku/feature/b_xzk_improve_file_handle

Feature/b xzk improve file handle
rename
m md
M title and rename md file to markdown
D auth.md
Merge remote-tracking branch 'qiniu/develop' into fix_apidocName
fix merge
fix merge
Merge pull request #38 from icattlecoder/fix_apidocName

Fix apidoc name
Update CHANGELOG.md

To release 6.1.2
Update CHANGELOG.md
Merge pull request #39 from qiniu/develop

for docs.qiniu.com release 6.1.2