Removed less than 20% of zip codes (for coverage)

- Adjusted test
Added less than 100% of cities (for coverage)

- Adjusted test
- Refactoring
Added test for renamed cities

- Refactoring
Added test for cities with set/unset region
Verified that IP blocks of cities with and without region get deleted with the country
Added zip code to removed city

- Not deleted
Excluded download methods from code coverage
Added test for US states legacy code

- MaxMind formerly used state numbers in US region codes
- Verified that state renaming is working
Excluded console output methods from code coverage
Added test for normalization of location names

- Excluded non-existent cities ending with (1) etc.
Excluded console output and file read methods from code coverage
Ignored zip codes in cities with an invalid name