Add ref documentation and doxygen

doc/Jamfile.v2

@@ -5,14 +5,28 @@
 # Version 1.0. (See accompanying file LICENSE_1_0.txt
 # or copy at http://boost.org/LICENSE_1_0.txt)
 
+import doxygen ;
 import quickbook ;
 
+doxygen ref_reference
+  :
+    [ glob ../../../boost/core/ref.hpp ]
+  :
+    <doxygen:param>ENABLE_PREPROCESSING=YES
+    <doxygen:param>EXPAND_ONLY_PREDEF=YES
+    <doxygen:param>EXTRACT_ALL=NO
+    <doxygen:param>EXTRACT_PRIVATE=NO
+    <doxygen:param>HIDE_UNDOC_MEMBERS=YES
+    <doxygen:param>MACRO_EXPANSION=YES
+  ;
+
 xml core : core.qbk ;
 
 boostbook standalone
   :
     core
   :
+    <dependency>ref_reference
     <xsl:param>boost.root=http://boost.org/doc/libs/master
     <xsl:param>generate.section.toc.level=1
     <xsl:param>toc.max.depth=1