Massive dependency reduction. Removed dependency on several boost libraries and standard C++ headers.

test/slist_test.cpp

@@ -59,7 +59,7 @@ public:
    slist<recursive_slist> slist_;
    slist<recursive_slist>::iterator it_;
    slist<recursive_slist>::const_iterator cit_;
-   
+
    recursive_slist &operator=(const recursive_slist &o)
    { slist_ = o.slist_;  return *this; }
 };