Add (ice-9 unicode) module

* libguile/unicode.c:
* libguile/unicode.h:
* test-suite/tests/unicode.test:
* module/ice-9/unicode.scm: New files.

* module/Makefile.am:
* libguile/Makefile.am:
* test-suite/Makefile.am:
* libguile/init.c: Wire new files into the build.

* doc/ref/api-data.texi: Add docs.

libguile/unicode.h

@@ -0,0 +1,37 @@
+/* classes: h_files */
+
+#ifndef SCM_UNICODE_H
+#define SCM_UNICODE_H
+
+/* Copyright (C) 2014 Free Software Foundation, Inc.
+ *
+ * This library is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU Lesser General Public License as
+ * published by the Free Software Foundation, either version 3 of the
+ * License, or (at your option) any later version.
+ *
+ * This library is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU Lesser General Public License for more details.
+ *
+ * You should have received a copy of the GNU Lesser General Public
+ * License along with this library.  If not, see
+ * <http://www.gnu.org/licenses/>.
+ */
+
+
+
+#include "libguile/__scm.h"
+
+SCM_INTERNAL SCM scm_formal_name_to_char (SCM);
+SCM_INTERNAL SCM scm_char_to_formal_name (SCM);
+SCM_INTERNAL void scm_init_unicode (void);
+
+#endif  /* SCM_UNICODE_H */
+
+/*
+  Local Variables:
+  c-file-style: "gnu"
+  End:
+*/