Add check for python in setup.sh

if echo "${PATH}" | grep --quiet "cmake-3.3.2";

then

    if ! command -v python > /dev/null;

    then

        echo "Could not remove old CMake version from Path. Please install python"

    else

        echo "Removing old CMake version 3.3.2 distributed with Vivado from Path"

        export PATH=`python -c "import re; print(re.sub(r'[:][^:]*?cmake[-]3[.]3[.]2.*?[:]', ':', '${PATH}'));"`

    fi

fi