Use consistent naming of components

Rename "pvcd" to "pvcnoded", and "pvc-api" to "pvcapid" so names for the
daemons are fully consistent. Update the names of the configuration
files as well to match this new formatting.

References #79

api-daemon/pvcapid.service

@@ -0,0 +1,16 @@
+# Parallel Virtual Cluster API client daemon unit file
+
+[Unit]
+Description = Parallel Virtual Cluster API client daemon
+After = network-online.target
+
+[Service]
+Type = simple
+WorkingDirectory = /usr/share/pvc
+Environment = PYTHONUNBUFFERED=true
+Environment = PVC_CONFIG_FILE=/etc/pvc/pvcapid.yaml
+ExecStart = /usr/share/pvc/pvcapid.py
+Restart = on-failure
+
+[Install]
+WantedBy = multi-user.target