boostorg/units — pull request #8 by mkurdej (2014-08-28 09:50:31+00:00)
Title: Fix test_headers: missing #include <boost/units/quantity.hpp>

`#include ` was missing in codata headers (not self-contained).

Move quantity template class default argument from `quantity.hpp` to `units_fwd.hpp`.
It may be necessary to do the same for other forward declarations.