Include option to install apt-get, npm and brew packages in install script

[jeffgodwyll]

!/usr/bin/env bash

set -e

CONFIG="install.conf.yaml"
DOTBOT_DIR="dotbot"

DOTBOT_BIN="bin/dotbot"
BASEDIR="$(cd "$(dirname "${BASH_SOURCE[0]}")" && pwd)"

cd "${BASEDIR}"
git submodule update --init --recursive "${DOTBOT_DIR}"

"${BASEDIR}/${DOTBOT_DIR}/${DOTBOT_BIN}" -d "${BASEDIR}" -c "${CONFIG}" "${@}"

if [ "$(expr substr $(uname -s) 1 5)" == "Linux" ]; then
    echo "do something/install packages?..."
fi