Utfx.hpp now includes cassert, so everything does.
Aliased cstdint types.
Defined import/export macros.
Defined and documented UTFX_UNREFERENCED.
Added macro for working around gcc 'using' bug.
Declared and documented namespace Utfx::Details.
Defined and documented Dim().
Doxygen no longer explodes on the import/export macros.
Fixed include path in Test's CMakeLists.txt.
Added code points defs and unit tests.