rename headers to match style

Moving headers from ".h" to ".hpp"

Reworked the header inclusion a bit so that host-ipmid is treated as a
library, and local headers aren't.

renamed apphandler.h => apphandler.hpp
renamed chassishandler.h => chassishandler.hpp
renamed globalhandler.h => globalhandler.hpp
renamed sensorhandler.h => sensorhandler.hpp
renamed storageaddsel.h => storageaddsel.hpp
renamed storagehandler.h => storagehandler.hpp
renamed systemintfcmds.h => systemintfcmds.hpp

Change-Id: I9d4ce3dd57e2e996800f9020a10cc10cdf2c3914
Signed-off-by: Patrick Venture <venture@google.com>
diff --git a/sensorhandler.cpp b/sensorhandler.cpp
index 7c6a4dc..80f7c4b 100644
--- a/sensorhandler.cpp
+++ b/sensorhandler.cpp
@@ -1,10 +1,11 @@
-#include "sensorhandler.h"
+#include "sensorhandler.hpp"
 
 #include "fruread.hpp"
 #include "ipmid.hpp"
 #include "types.hpp"
 #include "utils.hpp"
 
+#include <host-ipmid/ipmid-api.h>
 #include <mapper.h>
 #include <math.h>
 #include <stdio.h>
@@ -18,8 +19,6 @@
 #include <xyz/openbmc_project/Common/error.hpp>
 #include <xyz/openbmc_project/Sensor/Value/server.hpp>
 
-#include "host-ipmid/ipmid-api.h"
-
 static constexpr uint8_t fruInventoryDevice = 0x10;
 static constexpr uint8_t IPMIFruInventory = 0x02;
 static constexpr uint8_t BMCSlaveAddress = 0x20;