Add kbutton.h, fix includes

engine/client/cl_main.c

@@ -19,7 +19,7 @@ GNU General Public License for more details.
 #include "cl_tent.h"
 #include "gl_local.h"
 #include "input.h"
-#include "../cl_dll/kbutton.h"
+#include "kbutton.h"
 #include "vgui_draw.h"
 
 #define MAX_TOTAL_CMDS		32
@@ -2831,4 +2831,4 @@ void CL_Shutdown( void )
 	R_Shutdown ();
 
 	Con_Shutdown ();
-}
+}