Matadata for analyses in json

[mmikhasenko]

decide what field we need there.
Here is an example from RIVET, with the yaml description

see also HEPData additional information here

[mmikhasenko]

Name: <XXX>
Year: <XXX>
Experiment: <XXX>
Status: <XXX> # unclear
Encoding contact:
 - <Name Familyname> <EMAIL>
References: [
 {reference = "Phys.Rev.C 90 (2014) 025206, 2014"
 inspireID = 1297221},
 {}]
Description: # would keep instead of `summary`
  'Measurement of kinematic distributions in the decay $\eta\to\pi^0\gamma\gamma$.'
Framework: # used for obtaining the model 
  ["COMPWA", ..]
Keywords: ["Dalitz plot", "Exotic Mesons"]
BibTeX: # not clear if needed.