Add Tox: Include tox for multiversion testing

.gitignore

@@ -7,3 +7,4 @@
 build/
 coverage/
 nosetests.xml
+.tox/

.travis.yml

@@ -1,3 +1,6 @@
+# Configuration for Travis CI
+# When making changes, make sure to also edit tox.ini file.
+
 language: python
 
 python:

README.rst

@@ -18,6 +18,31 @@ Or can be installed using easy_install::
 
     $ easy_install aweber_api
 
+
+Testing
+=======
+
+Place the client library into a virtualenv and execute the test suite by running the following command::
+
+    $ python setup.py nosetests
+
+Also, the project can use tox to run against multiple versions of python.  The tox package is available 
+from pypi here::
+
+    https://pypi.python.org/pypi/tox
+
+Instructions for how to use and configure tox can be found here::
+
+    http://tox.readthedocs.org/en/latest/#
+
+Currently, running tox will require that both python 2.6 and python 2.7 are installed.
+
+Additional interpreters may be installed and the tox.ini file must be modified to include the
+newly added interpreters.  Once the interpreters are installed, the tests can be run via::
+
+    $ tox
+
+
 Usage
 =====
 

setup.py

@@ -28,7 +28,7 @@
     ],
     packages=find_packages(exclude=['tests']),
     install_requires=[
-        'httplib2>=0.7.0',
+        'httplib2>=0.7.0,<=0.8.0',
         'oauth2>=1.2',
     ],
     tests_require=[

tox.ini

@@ -0,0 +1,15 @@
+#  When making changes, make sure to also edit the .travis.yml file.
+
+[tox]
+envlist = py26, py27
+
+[testenv]
+commands = python setup.py nosetests []
+
+deps =
+    nose
+    httplib2>=0.7.0,<=0.8.0
+    oauth2>=1.2
+    unittest2
+    coverage
+    dingus