It should generate index for languages

lib/json/encodeOutput.js

@@ -0,0 +1,22 @@
+var encodeBook = require('./encodeBook');
+
+/**
+    Encode an output to JSON
+
+    @param {Output}
+    @return {Object}
+*/
+function encodeOutputToJson(output) {
+    var book = output.getBook();
+    var generator = output.getGenerator();
+
+    var result = encodeBook(book);
+
+    result.output = {
+        name: generator
+    };
+
+    return result;
+}
+
+module.exports = encodeOutputToJson;