Merge pull request #41 from daweibayu/master

update version

Merge pull request #29 from daweibayu/master

update version

Merge pull request #24 from daweibayu/bug_fix

stop play when record start

Merge pull request #23 from daweibayu/master

update version

Merge pull request #15 from daweibayu/master

update grade config

Merge pull request #14 from daweibayu/master

bug fix