Remove Geocoder.config method.

This requires a parameter to be accepted by the block passed to
Geocoder.configure, which means you don't need to remember that the
method is called "config"--you can call it whatever you want.
This behavior seems more standard for configuration blocks.

lib/geocoder.rb

@@ -70,10 +70,6 @@ module Geocoder
 
   private # -----------------------------------------------------------------
 
-  def config # :nodoc
-    Configuration.instance
-  end
-
   ##
   # Get a Lookup object (which communicates with the remote geocoding API).
   # Takes a search query and returns an IP or street address Lookup
@@ -135,4 +131,3 @@ if defined?(Rails)
   require "geocoder/railtie"
   Geocoder::Railtie.insert
 end
-

lib/geocoder/configuration.rb

@@ -7,7 +7,7 @@ module Geocoder
   #
   def self.configure(&block)
     if block_given?
-      module_eval(&block)
+      block.call(Configuration.instance)
     else
       Configuration.instance
     end

test/calculations_test.rb

@@ -3,7 +3,7 @@ require 'test_helper'
 
 class CalculationsTest < Test::Unit::TestCase
   def setup
-    Geocoder.configure do
+    Geocoder.configure do |config|
       config.units  = :mi
       config.distances = :linear
     end

test/configuration_test.rb

@@ -39,7 +39,7 @@ class ConfigurationTest < Test::Unit::TestCase
   # --- Geocoder#configure distances configuration ---
   def test_geocoder_configuration
     # DSL
-    Geocoder.configure do
+    Geocoder.configure do |config|
       config.units  = :mi
       config.distances = :linear
     end