Merge pull request #5 from qiniu/develop

Release v1.0.01
Merge pull request #8 from qiniu/develop

hotfix: Release v1.0.01
fixed SIGSEGV caused by go's gc
added float type
fixed float issue
env-var instade of hardcode
Merge branch 'develop'
Merge branch 'master' into develop
merge from qiniu/py
using pkg-config, removed helper-script
Merge pull request #19 from mikespook/develop

保留测试用例里的 runtime.GC