Extrospector and Interoceptor both inherit from Sensor now

hcore/include/sensors/extrospector.h

@@ -2,18 +2,22 @@
 #define _EXTROSPECTOR_H
 
 #include <cstdint>
+#include <sensors/sensor.h>
+
+namespace hk {
+namespace sensors {
 
 class Extrospector
+: public Sensor
 {
 public:
-    Extrospector(uint32_t _id, uint32_t _value = 0)
-    : id(_id), value(_value)
-    {}
+    Extrospector(void) = default;
     ~Extrospector() = default;
 
 public:
-    uint32_t id;
-    uint64_t value;
 };
 
+} // namespace sensors
+} // namespace hk
+
 #endif // _EXTROSPECTOR_H