Merge pull request #71 from lukeyeager/nvidia/fix-py3-travis-boost

Cherry-pick TravisCI python3 fix

scripts/travis/travis_install.sh

@@ -70,6 +70,10 @@ if [ ! -d $CONDA_DIR ]; then
 	./miniconda.sh -b -p $CONDA_DIR
 
 	conda update --yes conda
+	# The version of boost we're using for Python 3 depends on 3.4 for now.
+	if [ "$PYTHON_VERSION" -eq "3" ]; then
+		conda install --yes python=3.4
+	fi
 	conda install --yes numpy scipy matplotlib scikit-image pip
 	# Let conda install boost (so that boost_python matches)
 	conda install --yes -c https://conda.binstar.org/menpo boost=1.56.0