Added README and install file to yaourt-auto-sync

pkg/yaourt-auto-sync/README.md

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+# Pacman Auto Update
+
+Arch Linux package to install a systemd service and timer which updates the system every hour if needed.
+
+## See timer
+
+Look for a timer with name `pacman-auto-update.timer`
+
+
+```sh
+systemctl list-timers
+```
+
+## License
+
+yaourt-auto-sync GitHub repo: https://github.com/hmlendea/yaourt-auto-sync
+pacman-auto-update GitHub repo: https://github.com/cmuench/pacman-auto-update

pkg/yaourt-auto-sync/yaourt-auto-sync.install

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+post_install() {
+    systemctl enable --now yaourt-auto-sync.timer || true
+}
+
+post_upgrade() {
+    systemctl --system daemon-reload >/dev/null || true
+    systemctl restart yaourt-auto-sync.timer || true
+}
+
+pre_remove() {
+    if [ -d /run/systemd/system ]; then
+        systemctl disable --now yaourt-auto-sync.timer >/dev/null
+    fi
+}
+
+post_remove() {
+    if [ -d /run/systemd/system ] ; then
+        systemctl --system daemon-reload >/dev/null || true
+    fi
+}
+