fix "global leak detected: i"; use blanket instead of jscoverage
use urllib instead of http(s)
add default rpc timeout: one hour
add config for new buff encoding;

fixed: upload image can't set encoding to binary 
添加配置，可以设置buff的编码，修复上传图片等二进制文件，文件编码乱码的问题
fix callback url option in PutPolicy
Merge pull request #78 from lzyzsd/develop

fix callback url option in PutPolicy
Merge pull request #77 from h1bomb/develop

modify 'PutExtra' method :add config for new buff encoding;
Merge pull request #75 from fengmk2/urllib

Using urllib fixed #74
add warning of utf8 keys
Merge pull request #80 from longshanksmo/develop

add warning of utf8 keys
back
should 1.2.2
Merge pull request #82 from lintianzhi/fix/travis_ci

should to 1.2.2
adjust download domain
Merge pull request #83 from longshanksmo/develop

adjust download domain
Update CHANGELOG.md
Merge pull request #81 from qiniu/develop

add warning of utf8 keys