Created ingv-sxg.yaml

Note: I haven't found any documentation referring to this model in the way spelled out above next to "name."  It's always INGV-SXG.  See official model documentation at:
http://www.cmcc.it/wp-content/uploads/2012/08/rp0015-ans-02-2007-1.pdf

INGV = Istituto Nazionale di Geofisica e Vulcanologia
SXG = SINTEX-G
SINTEX = "Scale Interactions Experiment" (text below comes from  pp. 3019, lefthand column, 1st not-full paragraph of doc. at:
http://journals.ametsoc.org/doi/pdf/10.1175/JCLI4164.1 
   "Using the Scale Interactions
Experiment (SINTEX) CGCM, Gualdi et al. (2003)
suggested that a particular IOD event in the model
does not reach peak strength owing to the presence of
strong ISD activity in the Indian Ocean"