add countries and timezone calls

lib/campaign_monitor.rb

@@ -149,6 +149,18 @@ def parsed_system_date
     DateTime.strptime(system_date, timestamp_format)
   end
 
+  def countries
+    handle_response(User_GetCountries()) do | response |
+      response["string"]
+    end
+  end
+
+  def timezones
+    handle_response(User_GetTimezones()) do | response |
+      response["string"]
+    end
+  end
+
   # Returns an array of Campaign objects associated with the specified Client ID
   #
   # Example

test/campaign_monitor_test.rb

@@ -43,6 +43,16 @@ def test_can_access_two_accounts_at_once
     assert_equal "abcdef", @client2.cm_client.api_key
   end
 
+  def test_timezones
+    assert_equal 90, @cm.timezones.length
+  end
+
+  def test_countries
+    countries=@cm.countries
+    assert_equal 246, countries.length
+    assert countries.include?("United States of America")
+  end
+
 
   # campaigns