add __all__ and default values for start and stop
add __all__ and default values for start and stop

nvoron23/owasp-pysec,cardoso010/owasp-pysec,blabla1337/owasp-pysec,ebranca/owasp-pysec,ebranca/owasp-pysec,cardoso010/owasp-pysec,cardoso010/owasp-pysec,nvoron23/owasp-pysec,ebranca/owasp-pysec,blabla1337/owasp-pysec,blabla1337/owasp-pysec,nvoron23/owasp-pysec