replaced std::auto_ptr by new std::unique_ptr

examples/address.cxx

@@ -45,7 +45,7 @@ int main(int, char**) try {
         <url>http://swissign.com</url>\
         <url>http://swissign.ch</url>\
       </address>");
-  std::auto_ptr<xml::Node> author(addrTpl.read(ss));
+  std::unique_ptr<xml::Node> author(addrTpl.read(ss));
   // write to stdout
   std::cout<<"Successfully read:"<<std::endl
            <<"------------------------------"<<std::endl

examples/node_macros.cxx

@@ -22,7 +22,7 @@ int main(int, char**) {
                        "    <element>Hello</element>\n"
                        "  </child>\n"
                        "</base>");
-  std::auto_ptr<xml::Node> file(test.read(ss));
+  std::unique_ptr<xml::Node> file(test.read(ss));
   std::cout<<"The text in element is: "
            <<(*file)[xml::name::child][xml::name::element].text()
            <<std::endl;