Tests were failing like this:
  <Geocoder::Result::Nominatim> expected but was
  <"Geocoder::Result::Nominatim">

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