#160 unique child style tags should not be overwritten
#160 unique child style tags should not be overwritten

this fixes #160

obscene/Obscene-Stylesheet,dustin-H/react-look,rofrischmann/react-look,rofrischmann/react-look,dustin-H/react-look,obscene/Obscene-Stylesheet,obscene/Obscene-Stylesheet,rofrischmann/react-look