Add README.md in docs/
Add README.md in docs/

xlz/rosbeam,xlz/rosbeam,wbthomason/rosbeam,Cornell-RPAL/rosbeam,Cornell-RPAL/rosbeam,Cornell-RPAL/rosbeam,xlz/rosbeam,wbthomason/rosbeam,wbthomason/rosbeam,xlz/rosbeam,Cornell-RPAL/rosbeam,wbthomason/rosbeam