Detailed changes:
=================

+ added stlsoft::fast_strftime() and stlsoft::fast_wcsftime() as drop-in replacements for std::strftime() and std::wcsftime()
+ added get_ptr() shim overload for std::shared_ptr and std::unique_ptr
+ added stlsoft::get_top() attribute shim
+ stlsoft::basic_string_view<>::substr()
+ added winstl_C_format_message_strerror_w()
- removed stlsoft::literal_cast<>
~ various portability improvements to newer compilers