refactoring

Boolean.go

@@ -0,0 +1,15 @@
+package geagle
+
+type Boolean string
+
+func True() Boolean {
+	return "yes"
+}
+
+func False() Boolean {
+	return "no"
+}
+
+func (b Boolean) ToBool() bool {
+	return b == "yes" || b == "on"
+}