XML-RPC for C/C++ (Xmlrpc-c) Code

Fix backward compatibility by making two constructors instead of adding optional argument

Add newline option to string constructor, crlfValue() method

Use ctime instead of time.h

Add i8 to C++

fix typos in comments

Properly wrap xmlrpc_env to avoid memory leak

C++ usability improvements to go with client documentation

Add some std namespace

Move interface header files to 'include' directory, rename as xmlrpc_c/xxx.h

Add libxmlrpc_server++. Fix C++ registry to do polymorphism right. Fix reference leak with xmlrpc_c::value