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/globalhandler.hpp b/globalhandler.hpp
new file mode 100644
index 0000000..23d3b3e
--- /dev/null
+++ b/globalhandler.hpp
@@ -0,0 +1,10 @@
+#pragma once
+
+#include <stdint.h>
+
+// Various GLOBAL operations under a single command.
+enum ipmi_global_control_cmds : uint8_t
+{
+    IPMI_CMD_COLD_RESET = 0x02,
+    IPMI_CMD_WARM_RESET = 0x03,
+};