put: fix boundary description;add boundary end
Merge pull request #48 from chzyer/patch-1

put: fix boundary description;add boundary end
fix pic
fix pic size
Merge pull request #49 from coaku/feature/b_xzk_fix_upload_pic

Feature/b xzk fix upload pic
add preset
Merge pull request #50 from longshanksmo/feature/add-preset

add preset
Update audio-video-hls-process.markdown
Update audio-video-hls-process.markdown

"-" => "_"
Update CHANGELOG.md
Merge pull request #51 from qiniu/develop

Release 6.1.4