Error compiling cpp tutorials

Error details (several cases in CppServer.cpp and CppClient.cpp):

CppServer.cpp: In function 'int main(int, char**)':
CppServer.cpp:116:3: error: reference to 'shared_ptr' is ambiguous

This is caused due to the inclusion of both 'std' and 'boost' namespaces, which both define 'shared_ptr'. Code expects the use of 'boost::shared_ptr'.