Dodany srednik w SQL/model fizyczny.sql. Maly refactoring.
Znowu troche refaktoring, ale dodalem rowniez feature'y.
Merge remote-tracking branch 'origin/master' into kaiks

Conflicts:
	SQL/model fizyczny.sql
	quiz_management/app/controllers/quiz_controller.rb
	quiz_management/app/helpers/pytanie_helper.rb
	quiz_management/app/models/ranking.rb
Merge pull request #54 from jam231/kaiks

Kaiks