Use container_fwd.hpp for the hash functions.

[SVN r32583]

include/boost/functional/hash/deque.hpp

@@ -15,7 +15,6 @@
 #endif
 
 #include <boost/config.hpp>
-#include <deque>
 #include <boost/functional/hash/hash.hpp>
 
 namespace boost

include/boost/functional/hash/hash.hpp

@@ -18,11 +18,11 @@
 #include <boost/config.hpp>
 #include <cstddef>
 #include <cmath>
-#include <string>
 #include <functional>
 #include <errno.h>
 #include <boost/limits.hpp>
 #include <boost/functional/detail/float_functions.hpp>
+#include <boost/functional/detail/container_fwd.hpp>
 #include <boost/detail/workaround.hpp>
 
 #if defined(BOOST_NO_FUNCTION_TEMPLATE_ORDERING)

include/boost/functional/hash/list.hpp

@@ -16,7 +16,6 @@
 #endif
 
 #include <boost/config.hpp>
-#include <list>
 #include <boost/functional/hash/hash.hpp>
 
 namespace boost

include/boost/functional/hash/map.hpp

@@ -16,7 +16,6 @@
 #endif
 
 #include <boost/config.hpp>
-#include <map>
 #include <boost/functional/hash/hash.hpp>
 #include <boost/functional/hash/pair.hpp>
 

include/boost/functional/hash/pair.hpp

@@ -16,7 +16,6 @@
 #endif
 
 #include <boost/config.hpp>
-#include <utility>
 #include <boost/functional/hash/hash.hpp>
 
 namespace boost

include/boost/functional/hash/set.hpp

@@ -16,7 +16,6 @@
 #endif
 
 #include <boost/config.hpp>
-#include <set>
 #include <boost/functional/hash/hash.hpp>
 
 namespace boost

include/boost/functional/hash/vector.hpp

@@ -16,7 +16,6 @@
 #endif
 
 #include <boost/config.hpp>
-#include <vector>
 #include <boost/functional/hash/hash.hpp>
 
 namespace boost