Запрос на слияние 'feature/singletone' (#4) из feature/singletone в master

rewrote tests

edited settings.json

deleted storage.json

rewrote abstract manager

rewrote tests

edited settings.json

deleted storage.json

rewrote abstract manager

rewrote settings and storage managers

added recipe and uml diagrem

added singletone class StorageManager and its tests

added json file with settings

rewrote tests with validator

added singletone class SettingsManager

Запрос на слияние 'feature/error-processing' (#2) из feature/error-processing в master

added comments to exceptions classes

added address field to class

added description of bik in table

fixed constructors

added comments to exceptions classes

added address field to class

added description of bik in table

fixed constructors

added tests for models

added Logics directory

added models according to task

mistake commit deleted

exception processing homework done