Merge pull request #31 from qiniu/develop

Release v6.0.0
Merge pull request #39 from qiniu/develop

for docs.qiniu.com release 6.1.2
Merge pull request #41 from qiniu/develop

Replace text picture with real picture
Merge pull request #45 from qiniu/develop

fix lost tag in put & add some sample to image process
Merge pull request #47 from qiniu/develop

Release 6.1.3
Merge pull request #51 from qiniu/develop

Release 6.1.4
modify for general usage
add links
fix some error
solve conflict
Merge pull request #52 from longshanksmo/feature/gen-use

Feature/gen use
add comment on QR code
Merge pull request #54 from longshanksmo/feature/qrcode-pic-type

add comment on QR code
add resumble
add resumble
add resumble
add resumble
resumble up
resumble up
resumble up