20 days of unstoppable work. Waiting fo go 1.8, I didn't finish yet, some touches remains.

Former-commit-id: ed84f99c89f43fe5e980a8e6d0ee22c186f0e1b9

middleware/i18n/config.go

@@ -0,0 +1,18 @@
+package i18n
+
+// Config the i18n options
+type Config struct {
+	// Default set it if you want a default language
+	//
+	// Checked: Configuration state, not at runtime
+	Default string
+	// URLParameter is the name of the url parameter which the language can be indentified
+	//
+	// Checked: Serving state, runtime
+	URLParameter string
+	// Languages is a map[string]string which the key is the language i81n and the value is the file location
+	//
+	// Example of key is: 'en-US'
+	// Example of value is: './locales/en-US.ini'
+	Languages map[string]string
+}