Issue minicom/simmc#24: Service implementation

Signed-off-by: Jedian Marcos Brambilla <jmb15@c3sl.ufpr.br>

Makefile

+all:
+	@echo "Run \"make install\" to install the daemon. (You may need root privileges)"
+
+install:
+	@echo "Installing daemon."
+	@if [ ! -e ./gesacmonit.conf ]; then echo "Configuration file not found! (Perhaps you forgot to copy and change it?)\n$$\tcp gesacmonit.conf.example gesacmonit.conf"; false; fi
+	@cp ./daemon/gesacmonit.service /etc/systemd/system/
+	@mkdir -p /usr/local/bin/gesacmonit/
+	@mkdir -p /etc/gesacmonit/
+	@cp ./gesacmonit.conf /etc/gesacmonit/
+	@cp ./src/* /usr/local/bin/gesacmonit/
+	@touch /usr/local/bin/gesacmonit/gesacmonit.pid
+	@systemctl daemon-reload
+	@echo "Daemon installed."
+
+uninstall:
+	@echo "Uninstalling daemon."
+	@rm -rf /usr/local/bin/gesacmonit
+	@rm -rf /etc/gesacmonit
+	@rm /etc/systemd/system/gesacmonit.service
+	@systemctl daemon-reload
+	@echo "Daemon uninstalled."

daemon/gesacmonit.service

+[Unit]
+Description=gesacmonit script
+After=network.target
+
+[Service]
+Environment=GESACMONIT_CONFIG=/etc/gesacmonit/gesacmonit.conf
+Environment=GESACMONIT_PIDFILE=gesacmonit.pid
+WorkingDirectory=/usr/local/bin/gesacmonit/
+ExecStart=/usr/bin/python3 gesacmonit.py ${GESACMONIT_CONFIG} ${GESACMONIT_PIDFILE}
+
+[Install]
+WantedBy=multi-user.target