Added keyboard support

source/opaque_type.h

@@ -0,0 +1,11 @@
+#pragma once
+
+//always first member of any opaques
+typedef enum OpaqueType {
+	OPAQUE_KEYBOARD,
+	OPAQUE_ACTOR,
+} OpaqueType;
+
+typedef struct DummyOpaque {
+	OpaqueType type;
+} DummyOpaque;