Added

• A number of new functions for working with entries, elements, and params.
• A rollup header, stumpless.hpp, for the C++ library to make use easier.
• Logging functions that can be removed at compile time.

Fixed

• Added missing DLL exports of C++ library in standard Visual Studio builds.
• Local socket names are generated using mkstemp instead of using a static counter (issue #54).
• The current target is not left pointing at an invalid target structure after the current target is closed (issue #52).