This reverts commit 4ba15c82, reversing
changes made to c740bbb7.

Conflicts:
	lib/geocoder/lookups/mapquest.rb
	test/services_test.rb

To run a single file, use:

  ruby -I test <filename>

Test suite failed because railtie wasn't loaded (because
Rails/ActiveRecord are stubbed out in test env). This initializes
it explicitly in test_helper before any models get defined

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