Unpinned some requirements

To make requires.io happy

docs/requirements.txt

@@ -1,5 +1,5 @@
-Django>=1.6.2,<1.7
-django-modelcluster>=0.3
-django-taggit==0.11.2
+Django>=1.6.2,<1.8
+django-modelcluster>=0.4
+django-taggit==0.12.2
 django-treebeard==2.0
-six==1.7.3
+six>=1.7.0

requirements-dev.txt

@@ -1,6 +1,6 @@
 # For coverage and PEP8 linting
-coverage==3.7.1
-flake8==2.2.1
-mock==1.0.1
-python-dateutil==2.2
-pytz==2014.7
+coverage>=3.7.0
+flake8>=2.2.0
+mock>=1.0.0
+python-dateutil>=2.2
+pytz>=2014.7

setup.py

@@ -29,7 +29,7 @@ PY3 = sys.version_info[0] == 3
 
 install_requires = [
     "Django>=1.6.2,<1.8",
-    "South==1.0.0",
+    "South>=1.0.0",
     "django-compressor>=1.4",
     "django-libsass>=0.2",
     "django-modelcluster>=0.4",