Added std::array<std::size_t, Dim> constructor to vec.
Added tuple_reverse().
Improved transpose() to work for D > 2, added proper unit test.
Fixed unit test for subregion().
Added help formatting functions format::paragraph, format::header, format::bullet.
template_fit() now also returns the best fit fluxes.
Now using format:: functions.
Added 'fcolop' tool.