Add sensor object framework

Create a sensor object to store sensor monitoring specifications.

Tested:
    Sensor objects are created and stored for each sensor

Change-Id: Idfa982f1bb8da888abbd473881870df4beec6824
Signed-off-by: Matthew Barth <msbarth@us.ibm.com>
diff --git a/sensor.cpp b/sensor.cpp
index cbcbfeb..5fb1f38 100644
--- a/sensor.cpp
+++ b/sensor.cpp
@@ -11,6 +11,11 @@
 namespace sensor
 {
 
+Sensor::Sensor(const SensorSet::key_type& sensor) :
+    sensor(sensor)
+{
+}
+
 std::shared_ptr<StatusObject> addStatus(
         const SensorSet::key_type& sensor,
         const hwmonio::HwmonIO& ioAccess,