[host] initial service framework implemented

common/KVMGFXHeader.h

@@ -1,3 +1,4 @@
+#pragma once
 /*
 KVMGFX Client - A KVM Client for VGA Passthrough
 Copyright (C) 2017 Geoffrey McRae <geoff@hostfission.com>
@@ -16,6 +17,8 @@ this program; if not, write to the Free Software Foundation, Inc., 59 Temple
 Place, Suite 330, Boston, MA 02111-1307 USA
 */
 
+#include <stdint.h>
+
 #define KVMGFX_HEADER_MAGIC "[[KVMGFXHeader]]"
 
 typedef enum FrameType