Use nosetests for travis and fix a bug from renaming param

Author: oschwald

.travis.yml

@@ -5,7 +5,7 @@ python:
   - 3.1
   - 3.2
   - 3.3
-script: invoke test
+script: nosetests
 install:
   - pip install -r requirements.txt
 notifications:

geoip2/webservices.py

@@ -185,7 +185,8 @@ def country(self, ip_address='me'):
         :returns: :py:class:`geoip2.models.Country` object
 
         """
-        return self._response_for('country', geoip2.models.Country, ip)
+        return self._response_for('country', geoip2.models.Country,
+                                  ip_address)
 
     def omni(self, ip_address='me'):
         """This method calls the GeoIP2 Precision Omni endpoint.