Boost.Range merge from trunk to release.

This is motivated by the need to correct the istream_range, to correct the adaptors.hpp header file, and correct the return types of various range algorithms.

[SVN r61517]

include/boost/range/algorithm/replace_if.hpp

@@ -36,17 +36,6 @@ inline ForwardRange&
     return rng;
 }
 
-/// \overload
-template< class ForwardRange, class UnaryPredicate, class Value >
-inline const ForwardRange&
-    replace_if(const ForwardRange& rng, UnaryPredicate pred,
-               const Value& val)
-{
-    BOOST_RANGE_CONCEPT_ASSERT(( ForwardRangeConcept<const ForwardRange> ));
-    std::replace_if(boost::begin(rng), boost::end(rng), pred, val);
-    return rng;
-}
-
     } // namespace range
     using range::replace_if;
 } // namespace boost