[#30] Add validation to PlaceRent
[#21] Add fixture parkings.yml and test for fixture validation
[#20] Change project directory
[#22] Add addresses.yml and test for fixture wroclaw
[#23] Add cars.yml and test for fixture bmw
[#23] Correct typo in car_test.rb
[#24] Add people.yml and test for fixture steve
[#25] Add test and fixture
[#27] Add tests for address validation
[#28] Add validation test for Car
[#30] Add test to PlaceRent validation
[#29] Add validation and validation test to Parking
[#31] Add finish_all_place_rentals filter and refactor Parking test
[#31] Add before save filter to calculate price before PlaceRent is saved
Remove junk files.