Add refactoring lab
Add refactoring lab

lionell/university-labs,lionell/university-labs,lionell/labs,lionell/labs,lionell/labs,lionell/laboratories,lionell/university-labs,lionell/labs,lionell/university-labs,lionell/labs,lionell/laboratories,lionell/labs,lionell/labs,lionell/labs,lionell/labs,lionell/labs,lionell/laboratories,lionell/labs