Merge remote-tracking branch 'origin/develop'

Merge remote-tracking branch 'origin/develop'

Auto merge of mozillazg#31 - mozillazg:develop, r=mozillazg

v0.13.0

Auto merge of mozillazg#27 - mozillazg:new-0.12.0, r=mozillazg

v0.12.0

Auto merge of mozillazg#17 - mozillazg:develop, r=mozillazg

v0.11.0

Auto merge of mozillazg#16 - mozillazg:develop, r=mozillazg

v0.10.0