Wrappers for Backbone and Underscore as CommonJS Modules/2.0

gistfile1.js

// NEW underscore.js
module.declare([], function (require, exports, module) {
    // Contents of underscore.js

    // Backbone expects require("underscore") to be _
    // so let's make it so.
    exports._.extend(exports, exports._);
});

// NEW backbone.js
module.declare(
    [ { underscore: "location/to/wrapped/underscore" } ]
    , function (require, exports, module) {
        // Contents of backbone.js
    }
);