fixed not read zorder property
fixed read layout opacity
Merge branch 'v2' of https://github.com/2youyouo2/cocos2d-x into v2
fixed node set tag to node
read flip property
change tag to 4 space
change tab to 4 space
fixed not read visible property
Merge pull request #7077 from 2youyouo2/v2

fixed read bug