Huge refactoring

* Add new Result classes (Address, Bounds, Region, Country, County,
  Coordinates)
* Refactor dumpers (remove Interface suffix, define a new method
  signature)
* Remove Interface and Exception suffixes
* Rename properties such as:
    - city => locality
    - cityDistrict => subLocality
    - zipcode => postalCode
* Remove `autoload.php`

Refs #345

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