remove transform api
Merge pull request #114 from longbai/remove-transform

remove transform api
添加persistentPipeline
Merge pull request #116 from simon-liubin/add/pipeline

添加persistentPipeline
update key
update test
Merge pull request #118 from longbai/remove-transform

update test
Merge branch 'develop' of github.com:qiniu/java-sdk into update/local-error-code