Essential expressJS middlewares and general middleware loader for Swint

Warning: This is not the final draft yet, so do not use this until its official version is launched

$ npm install --save swint-middleware

• dir : String, default: path.dirname(require.main.filename)
• walkOption : Object, default: { ext: 'js' }

var middlewares = loader({
	dir: path.join(__dirname, 'middlewares')
}); // { middlewareA: [Function], middlewareB: [Function], ... }

app.use(myMiddleware(options));

• myMiddleware() (not myMiddleware itself) gets three arguments, which is req, res, next.