Change program name and add service file.

BlockyGrapher.service

@@ -0,0 +1,16 @@
+[Unit]
+Description=Physical display query grapher for Blocky DNS Server.
+After=syslog.target
+After=network.target
+#If you have Blocky service, its better to start grapher after it.
+#After=blocky.service
+[Service]
+Environment=PYTHONUNBUFFERED=1
+# Change according to your setup.
+User=user
+Group=user
+WorkingDirectory=/path/to/BlockyGrapher
+ExecStart=python3 BlockyGrapher.py --i2c-port 2 --i2c-address 0x3C
+KillSignal=sigterm
+[Install]
+WantedBy=multi-user.target