Moved most components of the library to iterators:: namespace.

This change excludes boost:: and boost::detail:: namespaces from ADL for unqualified function calls (e.g. algorithms). This reduces the possibility of name clashes with other libraries and user's code. One of the effects should be fixing test failures on gcc 4.2 and 4.4 due to clashed with Boost.TypeTraits.

Also some of the functions marked with inline keyword.

include/boost/iterator/indirect_iterator.hpp

@@ -30,12 +30,13 @@
 # include <boost/scoped_ptr.hpp>
 # include <boost/mpl/bool.hpp>
 # include <memory>
-#endif 
+#endif
 
 #include <boost/iterator/detail/config_def.hpp> // must be last #include
 
-namespace boost
-{
+namespace boost {
+namespace iterators {
+
   template <class Iter, class Value, class Category, class Reference, class Difference>
   class indirect_iterator;
 
@@ -44,8 +45,8 @@ namespace boost
     template <class Iter, class Value, class Category, class Reference, class Difference>
     struct indirect_base
     {
-        typedef typename iterator_traits<Iter>::value_type dereferenceable;
-        
+        typedef typename boost::detail::iterator_traits<Iter>::value_type dereferenceable;
+
         typedef iterator_adaptor<
             indirect_iterator<Iter, Value, Category, Reference, Difference>
           , Iter
@@ -69,7 +70,7 @@ namespace boost
     struct indirect_base<int, int, int, int, int> {};
   } // namespace detail
 
-    
+
   template <
       class Iterator
     , class Value = use_default
@@ -107,14 +108,14 @@ namespace boost
         : super_t(y.base())
       {}
 
-  private:    
+  private:
       typename super_t::reference dereference() const
       {
 # if BOOST_WORKAROUND(__BORLANDC__, < 0x5A0 )
           return const_cast<super_t::reference>(**this->base());
 # else
           return **this->base();
-# endif 
+# endif
       }
   };
 
@@ -132,6 +133,11 @@ namespace boost
     return indirect_iterator<Iter, Traits>(x);
   }
 
+} // namespace iterators
+
+using iterators::indirect_iterator;
+using iterators::make_indirect_iterator;
+
 } // namespace boost
 
 #include <boost/iterator/detail/config_undef.hpp>