Add initial installation script.

install.sh

@@ -0,0 +1,39 @@
+#!/bin/sh -e
+
+install_dotfiles() {
+	local target_dir="$1"
+	for d in dotfiles/*; do
+		cp -v "$d" "${target_dir}/$(basename "$d")"
+	done
+}
+
+install_files() {
+	local target_dir="$1"
+	local source_dir="${2:-.}"
+	if [ ! -d "${source_dir}" ]; then
+		echo "Source directory ${source_dir} does not exist, skipping."
+		return
+	fi
+	(
+		cd "${source_dir}"
+		for f in *; do
+			case "$f" in
+			^dotfiles)
+				install_dotfiles "${target_dir}"
+				;;
+			*)
+				if [ -d "$f" ]; then
+					(cd "$d" && install_files "${target_dir}/$f")
+				else
+					cp -v "$f" "${target_dir}"
+				fi
+				;;
+			esac
+		done
+	)
+}
+
+###
+
+install_files "${HOME}" home
+install_files "/etc" etc