Successful meeting in Gif-sur-Yvette

A successful 2-day 9ML committee meeting was held at the CNRS at Gif-sur-Yvette, France, with significant progress made towards the development of 9ML version 2.0. Of 20 proposals flagged for version 2.0 (see http://github.com/INCF/NineMLSpec/issues), 18 were accepted by the committee (plus an additional proposal that arose at the meeting) and a strong start was made on the remaining two.