Multiple files

This release introduces multiple arrays containing data for USA states based on your preference:

1. usaStates - the minimum required data
2. usaStatesFull - the minimum required + area, population, zip codes and counties data
3. usaStatesWithArea - the minimum required + area data
4. usaStatesWithCounties - the minimum required + counties data
5. usaStatesWithZipCodes - the minimum required + zip code data
6. usaStatesWithPopulation - the minimum required + population data
7. BONUS: usaCities - an array with all cities in the USA and details about the state they belong to

BREAKING CHANGES
The usaStates from v.1.x.x now contains only the minimum required data for the USA states.