add XXX
Merge pull request #1 from chzyer/feature/xxx

add XXX
add xx2
Merge pull request #2 from chzyer/feature/xx2

add xx2 by forker
add png
Merge pull request #3 from chzyer/feature/add_bug

add png
Merge remote-tracking branch 'new/develop' into feature/add_bug
Merge remote-tracking branch 'new/develop' into develop
Merge branch 'feature/add_bug' into develop