Extracting atomic method in SalaDAO
Extracting atomic method to check if is on DB in SalaDAO class
Extracting atomic method to check if classroom exists in SalaDAO class
Extracting atomic method of modify function from SalaDAO class
Uncomplicating code using atomic funtions and intermediate variables of SalaDAO class
Translating name of the class, from SalaDAO to ClassroomDAO
Merge branch 'testes' of https://github.com/ParleyMartins/Tecnicas into testes