Update install.md
Update install.md

Incorrect import of a Raw Component w.r.t theming.
See https://github.com/react-toolbox/react-toolbox/issues/654
jasonleibowitz/react-toolbox,showings/react-toolbox,rubenmoya/react-toolbox,react-toolbox/react-toolbox,react-toolbox/react-toolbox,showings/react-toolbox,rubenmoya/react-toolbox,jasonleibowitz/react-toolbox,soyjavi/react-toolbox,react-toolbox/react-toolbox,soyjavi/react-toolbox,rubenmoya/react-toolbox