#6 Fix deprecated auto_ptr warnings

[Heath Schultz]

unique_ptr seems to work fine as a drop in replacement in this particular case

After #include <memory>

add

#if __cplusplus > 201100L
using std::unique_ptr;
#else
#ifdef __GXX_EXPERIMENTAL_CXX0X__
using std::unique_ptr;
#else
#include <tr1/memory>
using std::tr1::unique_ptr;
#endif
#endif

... then change all instances of std::auto_ptr to unique_ptr

in files urdl-0.1/include/urdl/option_set.hpp urdl-0.1/include/urdl/impl/option_set.ipp

This library works GREAT... You can just pass lambdas as handlers and contain all your logic in one nice little wrapper function and everything just works as expected.