support producer#9

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sevennt wants to merge 18 commits intodidapinchegit:masterfrom

Commits on Mar 10, 2017

fmt code && add producer
sevennt
committed

Commits on Sep 18, 2017

Commits on Oct 9, 2017

rm useless comments
郑伟3
committed

Commits on Jan 16, 2018

Merge pull request #2 from qhyou11/master
sevennt
authored

Commits on Jan 20, 2018

update README
郑伟3
committed

Commits on Feb 27, 2018

updare README
郑伟3
committed
Merge pull request #3 from sevenNt/develop
sevennt
authored

Commits on Mar 7, 2018

remove useless import packages & fix some lint errors
郑伟3
committed
Update mq_client.go

qhyou11
authored and
郑伟3
committed
Update producer.go

qhyou11
authored and
郑伟3
committed
Update mq_client.go

qhyou11
authored and
郑伟3
committed
update README
郑伟3
committed
updare README
郑伟3
committed
remove useless import packages & fix some lint errors
郑伟3
committed
Merge branch 'master' of github.com:sevenNt/rocketmq
郑伟3
committed
modified some error message
郑伟3
committed