Basic initial implementation

This is a base implementation which does following
1. create a daemon,
2. parse config file and create a virtual sensor object
3. create list of virtual sensors for given config.
4. Creates a systemd unit file

It currently supports constant params only and dbus params will be in
follow up patch.

Signed-off-by: Vijay Khemka <vijaykhemka@fb.com>
Change-Id: I89b2ffb8bff67bdbb3033071cba9f6e565a9af6e
diff --git a/phosphor-virtual-sensor.service.in b/phosphor-virtual-sensor.service.in
new file mode 100644
index 0000000..4bba079
--- /dev/null
+++ b/phosphor-virtual-sensor.service.in
@@ -0,0 +1,11 @@
+[Unit]
+Description=Virtual sensors
+
+[Service]
+ExecStart=@bindir@/virtual-sensor
+Type=dbus
+BusName=xyz.openbmc_project.VirtualSensor
+SyslogIdentifier=phosphor-virtual-sensor
+
+[Install]
+WantedBy=multi-user.target