Add levels and fix tz?

cmd/d2data/main.go

@@ -28,6 +28,16 @@ var Skills = map[ID]Skill{
 {{- end }}
 }`
 
+const templateLevels = `// Code generated by d2data. DO NOT EDIT.
+// source: cmd/d2data/d2data/levels.json
+package area
+
+var Areas = map[ID]Area{
+{{- range $key, $value := . }}
+    {{ $key }}: {Name: "{{ $value.LevelName }}", ID: {{ $key }}},
+{{- end }}
+}`
+
 type skillDesc struct {
 	Skilldesc   string `json:"skilldesc"`
 	SkillPage   int    `json:"SkillPage"`
@@ -47,6 +57,11 @@ type Skill struct {
 	Name       string `json:"skill"`
 }
 
+type Level struct {
+	ID        int    `json:"Id"`
+	LevelName string `json:"LevelName"`
+}
+
 // Generate static code from https://github.com/blizzhackers/d2data data files.
 func main() {
 	err := generateFromFile(templateSkillDesc, "cmd/d2data/d2data/skilldesc.json", "pkg/data/skill/skilldesc.go", &map[string]skillDesc{})
@@ -58,6 +73,11 @@ func main() {
 	if err != nil {
 		log.Fatal(err)
 	}
+
+	err = generateFromFile(templateLevels, "cmd/d2data/d2data/levels.json", "pkg/data/area/areas.go", &map[string]Level{})
+	if err != nil {
+		log.Fatal(err)
+	}
 }
 
 func generateFromFile(templateName, filePath, outPath string, unmarshallStruct interface{}) error {