Pass-on mangle options from app to minifier

[prasad83]

When using AngularJS - javascript name mangle need to be avoided to overcome HTMLController to JS binding.

I tried to address this by passing on the mangle option from app to minifier (see the file changes):

In my app.js - used:

app.use(require('express-minify')({ mangle: false }));

[breezewish]

I think turn off mangle globally maybe not a good idea?