Optionally disable diffs for specific files in a pull request

We've got a few repositories which keep "built" css and javascript files checked in. We need to check these files in so our package manager (component) is able to access them at install-time, rather than forcing it to pre-process our stylesheets/templates (stylus, less, jade, whatever).

My request is that we can somehow tell the pull request view (https://bitbucket.org/user/repo/pull-request/XYZ/) to not display a diff on a few specific files. This could be a setting at the "Create pull request" step, the repository settings panel.. anywhere, really. This would make code reviews significantly easier and much faster.

An example repo structure would look like this:

$ tree
.
├── Makefile
├── Readme.md
├── cache.js
├── component.json
├── example.html
├── index.js
├── package.json
├── style.css # ignore diff
├── style.styl # show diff
├── template.jade # show diff
├── template.js # ignore diff
├── test
│   ├── cache.js
│   ├── generator.js
│   └── index.html
└── test-server.pid