Utility to transform given broccoli tree that contains browser API to be fastboot complaint.
a/b/c.js contains:js
window.foo = bar;
`The above file is not compatible in FastBoot. Therefore, you will need to wrap it with:
`js
var fastboot-transform = require('fastboot-transform');fastboot-transform(new Funnel('a/b/c.js'));
`The result of the above is:
`js
if (typeof FastBoot === 'undefined') {
window.foo = bar;
}
``