add rs junit test
fix one ommit
fix according to the suggestions
trigger travis check
travis check
add get with expiry field
polished code by review suggestions
fixed 2nd by review suggestions
just trigger travis build
remove mimeType check
Merge pull request #34 from wangjinlei/feature/add_expiry

add get with expiry field
Merge pull request #32 from wangjinlei/feature/add_rs_juint_test

add rs junit test
Merge branch 'feature/add_download_token', remote branch 'qiniu/develop' into feature/add_download_token
fix 1st by review suggestions