Vcmax one-point method

Tagged version used in the paper:

Unlocking the physiology in field-measured, light saturated photosynthesis: a test of a “one-point method” for estimating maximum carboxylation capacity

Martin G. De Kauwe, Yan-Shih Lin, Ian J. Wright, Belinda E. Medlyn, Kristine Y. Crous, David S. Ellsworth, Vincent Maire, I. Colin Prentice, Owen K. Atkin, Alistair Rogers, Ülo Niinemets, Shawn Serbin, Patrick Meir, Johan Uddling, Henrique F. Togashi, Lasse Tarvainen, Lasantha K. Weerasinghe, Brad J. Evans, F. Yoko Ishida and Tomas F. Domingues

Note: using branch 1pt_Vcmax_fitting