Update travis for py3

requirements-dev-py3.txt

@@ -0,0 +1,10 @@
+# The following are only required in development, not production
+nose
+coverage
+sphinx
+pep8
+autopep8
+
+# Required for optional extensions (only the ones supported on py3)
+pystache
+pyYaml

requirements-dev.txt

@@ -8,7 +8,5 @@ autopep8
 # Required for optional extensions
 pystache
 pyYaml
-
-# Note that the following will fail to install on py3
 configobj
 pylibmc

scripts/travis.sh

@@ -7,7 +7,12 @@ if [ "$PYCHECK" == "True" ]; then
     pip install argparse --use-mirrors
 fi
 
-pip install -r requirements.txt --use-mirrors
-pip install -r requirements-dev.txt --use-mirrors
+PYCHECK=$(python -c 'import sys; print(sys.version_info > (3, 0))')
+if [ "$PYCHECK" == "True" ]; then
+    pip install -r requirements-dev-py3.txt --use-mirrors
+else
+    pip install -r requirements-dev.txt --use-mirrors
+fi
+
 python setup.py nosetests
 exit $?