{
    "grid" : { "nx" : 100, "ny" : 1, "nz" : 100 },

    "variables" : ["pressure_0", "pressure_1", "velocity"],

    "output" : [ {"type" : "CheckVariables",
                  "rhythm" : 1000},
                 {"type" : "OutputVariables", 
                  "rhythm" : 1000, 
                  "format": "binary",
                  "file" : "./output/foobar"},
                 {"type" : "OutputReceivers", 
                  "rhythm" : 10, 
                  "format": "VTK",
                  "iz" : 10,
                  "file" : "./output/receivers.vtr"}]
}

Add default hardcoded JSON file
Add default hardcoded JSON file
