Refactoring api to use translations (chunk 1)

- Add spanish translations
- Files in order by name from admin to export
- Does not include api templates and tests
- Fix web_test to load translations
- Fix i18n to fallback to DEFAULT_LOCALE if no system locale found

api/api.go

@@ -30,7 +30,7 @@ func NewServerTemplatePage(templateName string) *ServerTemplatePage {
 func (me *ServerTemplatePage) Render() string {
 	var text bytes.Buffer
 	if err := ServerTemplates.ExecuteTemplate(&text, me.TemplateName, me); err != nil {
-		l4g.Error("Error rendering template %v err=%v", me.TemplateName, err)
+		l4g.Error(utils.T("api.api.render.error"), me.TemplateName, err)
 	}
 
 	return text.String()
@@ -52,10 +52,10 @@ func InitApi() {
 	InitLicense(r)
 
 	templatesDir := utils.FindDir("api/templates")
-	l4g.Debug("Parsing server templates at %v", templatesDir)
+	l4g.Debug(utils.T("api.api.init.parsing_templates.debug"), templatesDir)
 	var err error
 	if ServerTemplates, err = template.ParseGlob(templatesDir + "*.html"); err != nil {
-		l4g.Error("Failed to parse server templates %v", err)
+		l4g.Error(utils.T("api.api.init.parsing_templates.error"), err)
 	}
 }