Update doc with rev file example

[navarroaxel]

I spend the last 2 hours looking for how to use the gulp-rev-replace in gulp-useref@3. I found that the issue #131 has a comment with a link to this page https://github.com/yeoman/generator-gulp-webapp/blob/master/docs/recipes/asset-revisioning.md

I think this should be more accesible or a wiki page with this in the repository. How can I help to improve this?

Thanks!

[ghost]

Gulp rev replace isn't working in my case when using import: https://github.com/jonkemp/gulp-useref/issues/85