Moved code into src folder. Added build for component library.

scripts/check-lang.js

@@ -2,7 +2,7 @@
 const fs = require('fs');
 const path = require('path');
 const chalk = require('chalk');
-const messages = require('../lang/en-US.json');
+const messages = require('../src/lang/en-US.json');
 const ignore = require('../lang-ignore.json');
 
 const dir = path.resolve(__dirname, '../lang');