1ffy/sp-1: ДЗ по шаблонам проектирования @ a83f816d04e4eb5328e827336e030417082433cf

Vsevolod Levitan a83f816d04 Made validator singleton (as it doesn't have any instance-dependent features)		преди 1 година
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errors	ac3b2aa95f Enforced DRY for exceptions	преди 1 година
models	481ae826cc Removed unused imports	преди 1 година
settings	b741025cfa Delegated validation at settings_manager.py to validator.py	преди 1 година
validation	a83f816d04 Made validator singleton (as it doesn't have any instance-dependent features)	преди 1 година