Merge pull request fatbox#1 from ddimmich/master

updated requirements

Author: Evan Borgstrom

setup.py

@@ -12,9 +12,10 @@
         version="1.3",
         packages = ['xero',],
         install_requires=[
-            'httplib2==0.6.0',
+            'httplib2>=0.6.0',
             'oauth2==1.2.0',
             'SocksiPy-branch==1.02',
+            'python-dateutil',
             ],
         dependency_links=[
             'http://socksipy-branch.googlecode.com/issues/attachment?aid=30003000&name=SocksiPy-branch-1.02.tar.gz&token=61d76a1fa803a56bcfd1a93e34365158#egg=SocksiPy-branch-1.02',