Start kf (kyle's forth)

Here we go with another pass at writing a Forth.

misc/kf/build.yaml

@@ -0,0 +1,9 @@
+compilers:
+  cxx: clang++
+  ld: clang++
+
+targets:
+  cc:
+    kf:
+      - io.cc
+      - kf.cc

misc/kf/io.h

@@ -0,0 +1,10 @@
+#ifndef __KF_IO_H__
+#define __KF_IO_H__
+
+// TODO(kyle): make this selectable by architecture.
+
+class IO {
+
+};
+
+#endif // __KF_IO_H__

misc/kf/kf.cc

@@ -0,0 +1,8 @@
+#include "io.h"
+
+
+int
+main(void)
+{
+	return 0;
+}