Finish implementing parser

test/fixtures/simple.json

@@ -103,5 +103,53 @@
       "disposal limit (tonne)": {},
       "disposal cost ($/tonne)": {}
     }
+  },
+  "plants": {
+    "L1": {
+      "latitude (deg)": 41.881,
+      "longitude (deg)": -87.623,
+      "input mix (%)": {
+        "P1": 95.3,
+        "P2": 4.7
+      },
+      "output (tonne)": {
+        "P3": 0.25,
+        "P4": 0.12
+      },
+      "processing emissions (tonne)": {
+        "CO2": 0.1
+      },
+      "storage cost ($/tonne)": {
+        "P1": 0.1,
+        "P2": 0.1
+      },
+      "storage limit (tonne)": {
+        "P1": 100,
+        "P2": null
+      },
+      "disposal cost ($/tonne)": {
+        "P3": 0,
+        "P4": 0.86
+      },
+      "disposal limit (tonne)": {
+        "P3": null,
+        "P4": 1000.0
+      },
+      "capacities": [
+        {
+          "size (tonne)": 100,
+          "opening cost ($)": 500,
+          "fixed operating cost ($)": 300,
+          "variable operating cost ($/tonne)": 5.0
+        },
+        {
+          "size (tonne)": 500,
+          "opening cost ($)": 1000.0,
+          "fixed operating cost ($)": 400.0,
+          "variable operating cost ($/tonne)": 5.0
+        }
+      ],
+      "initial capacity (tonne)": 150
+    }
   }
 }