Rename all systemd, sysvinit and upstart files to libretime

Fixes: #516

python_apps/airtime-celery/install/systemd/libretime-celery.service

@@ -0,0 +1,14 @@
+[Unit]
+Description=LibreTime Celery Service
+After=network.target
+
+[Service]
+User=celery
+Group=celery
+Environment=RMQ_CONFIG_FILE=/etc/airtime/airtime.conf
+WorkingDirectory=/srv/airtime
+ExecStart=/usr/local/bin/celery worker -A airtime-celery.tasks:celery --time-limit=1800 --concurrency=1 --config=celeryconfig -l INFO
+Restart=always
+
+[Install]
+WantedBy=multi-user.target

python_apps/airtime_analyzer/install/systemd/libretime-analyzer.service

@@ -0,0 +1,11 @@
+[Unit]
+Description=LibreTime Media Analyzer Service
+
+[Service]
+ExecStart=/usr/bin/airtime_analyzer
+User=libretime-analyzer
+Group=libretime-analyzer
+Restart=always
+
+[Install]
+WantedBy=multi-user.target

python_apps/pypo/install/systemd/libretime-liquidsoap.service

@@ -0,0 +1,11 @@
+[Unit]
+Description=Libretime Liquidsoap Service
+
+[Service]
+ExecStart=/usr/bin/airtime-liquidsoap
+User=libretime-playout
+Group=libretime-playout
+Restart=always
+
+[Install]
+WantedBy=multi-user.target

python_apps/pypo/install/systemd/libretime-playout.service

@@ -0,0 +1,12 @@
+[Unit]
+Description=Libretime Playout Service
+After=network-online.target
+
+[Service]
+ExecStart=/usr/bin/airtime-playout
+User=libretime-pypo
+Group=libretime-pypo
+Restart=always
+
+[Install]
+WantedBy=multi-user.target