remove encoding of versions into the file system (for now?)

* module/ice-9/boot-9.scm (find-versioned-module): Remove. Still had
  some bugs (e.g. for "." in the path and in finding compiled files),
  did too much computation and statting, and we don't really want to
  promote versioning. Nor do we want to hard-code a particular encoding
  of versions in the file-system. Perhaps the real way to do this is to
  be extensible somehow.
  (try-module-autoload): Just dispatch to primitive-load-path in all cases.

* module/rnrs
* module/rnrs.scm:
* module/rnrs/arithmetic/bitwise.scm:
* module/rnrs/arithmetic/fixnums.scm:
* module/rnrs/arithmetic/flonums.scm:
* module/rnrs/base.scm:
* module/rnrs/conditions.scm:
* module/rnrs/control.scm:
* module/rnrs/enums.scm:
* module/rnrs/eval.scm:
* module/rnrs/exceptions.scm:
* module/rnrs/files.scm:
* module/rnrs/hashtables.scm:
* module/rnrs/io/simple.scm:
* module/rnrs/lists.scm:
* module/rnrs/mutable-pairs.scm:
* module/rnrs/mutable-strings.scm:
* module/rnrs/programs.scm:
* module/rnrs/r5rs.scm:
* module/rnrs/records/inspection.scm:
* module/rnrs/records/procedural.scm:
* module/rnrs/records/syntactic.scm:
* module/rnrs/sorting.scm:
* module/rnrs/syntax-case.scm:
* module/rnrs/unicode.scm: Move these files, eliding the "6/" infix, so
  that they are in the normal (unversioned) module path.

module/rnrs/unicode.scm

@@ -0,0 +1,104 @@
+;;; unicode.scm --- The R6RS Unicode library
+
+;;      Copyright (C) 2010 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, write to the Free Software
+;; Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
+
+
+(library (rnrs unicode (6))
+  (export char-upcase
+	  char-downcase
+	  char-titlecase
+	  char-foldcase
+	  
+	  char-ci=?
+	  char-ci<?
+	  char-ci>?
+	  char-ci<=?
+	  char-ci>=?
+	   
+	  char-alphabetic?
+	  char-numeric?
+	  char-whitespace?
+	  char-upper-case?
+	  char-lower-case?
+	  char-title-case?
+	  
+	  char-general-category
+	  
+	  string-upcase
+	  string-downcase
+	  string-titlecase
+	  string-foldcase
+	  
+	  string-ci=?
+	  string-ci<?
+	  string-ci>?
+	  string-ci<=?
+	  string-ci>=?
+	  
+	  string-normalize-nfd
+	  string-normalize-nfkd
+	  string-normalize-nfc
+	  string-normalize-nfkc)
+  (import (only (guile) char-upcase
+		        char-downcase
+			char-titlecase
+
+			char-ci=?
+			char-ci<?
+			char-ci>?
+			char-ci<=?
+			char-ci>=?
+
+			char-alphabetic?
+			char-numeric?
+			char-whitespace?
+			char-upper-case?
+			char-lower-case?
+
+			char-set-contains?
+			char-set:title-case
+
+			char-general-category
+
+			char-upcase
+			char-downcase
+			char-titlecase
+
+			string-upcase
+			string-downcase
+			string-titlecase
+	  
+			string-ci=?
+			string-ci<?
+			string-ci>?
+			string-ci<=?
+			string-ci>=?
+	  
+			string-normalize-nfd
+			string-normalize-nfkd
+			string-normalize-nfc
+			string-normalize-nfkc)
+	  (rnrs base (6)))
+
+  (define (char-foldcase char)
+    (if (or (eqv? char #\460) (eqv? char #\461))
+	char (char-downcase (char-upcase char))))
+
+  (define (char-title-case? char) (char-set-contains? char-set:title-case char))
+
+  (define (string-foldcase str) (string-downcase (string-upcase str)))
+)