Parse json to lua table string

data/GM_openspace_X0_info.txt

@@ -0,0 +1,20 @@
+{"Run":"Yihua_Zheng_011116_1",
+"Model":"SWMF",
+"Discipline":"magnetosphere",
+"Central Body":"Earth",
+"Spatial Scale (Custom)":"R_E",
+"Spatial Scale (SI)":"6371000 m",
+"Coordinates":"GSM",
+"Coordinate Type":"Cartesian",
+"Plot Variable":"N",
+"Plot Variable Unit (Custom)":"amu/cm^3",
+"Plot Variable Unit (SI)":"1.0e+06 amu/m^3",
+"Plot XMIN":0.0,
+"Plot XMAX":0.0,
+"Plot YMIN":-48.0,
+"Plot YMAX":48.0,
+"Plot ZMIN":-48.0,
+"Plot ZMAX":48.0,
+"Plot Scaling":"logarithmic (base: 10)",
+"ISWA_UPDATE_SECONDS":240
+}