* Add support for DB-IP.com geocoding service

* Added support for https with paid accounts

* Use `use_https` to distinguish between paid/unpaid API usage

* Clean rubocop warnings

* Added support for AMap, aka AutoNavi Map, 高德地图

* Try to include amap error info if failed

* Get correct result from amap response

* Fix result error in amap return

* Refactor codes for AMap handling

* Refactor codes for amap result handling

* Refactor amap handling codes

* Fixed coordinates handling error

* Added tests

* Fixded amap result handling and tests

* Lock webmock on 2.3.2 for ruby 1.9.3 support

* Add ip-api.com (ip lookup) support

This service returns better coordinates for Europe than other free ip lookup services available in geocoder.

* Clean the results class

Remove default responses for fields.

* Remove checking fields in url query

API already handles unknown fields, so this check is unnecessary.

* Add a test for using parameters directly in search method

The Yahoo BOSS Placefinder API is being discontinued.

https://developer.yahoo.com/boss/placefinder/

To run a single file, use:

  ruby -I test <filename>

GeoLite2 is a free version of a product called GeoIP2. Both use the same
format.

No longer documented. Removing to avoid confusion.
See: http://notes.ericjiang.com/posts/741

This is relevant for SmartyStreets, and seems like a good idea in
general (possibly supported by other APIs).

The result of the lookup in maxmind_local is stored at test/test_helper.rb to avoid the inclusion of maxmind's database in repository.

If you do this:

  Geocoder::Query.new("Kremlin, Moscow", :params => {:language => "ru"})

you should get a response in Russian ("ru") regardless of the value set
in Geocoder.configure(...).