Ref #94. It might be better for the output to say something like

added: foo (binary file)

than the current

Binary files /dev/null and b/foo differ

Please advise how to update the .po file every time the git-cola. pot file content changes without overwriting the previous translation.

It'd be neat to have a benchmark to test our diffing needs — perf is a feature, and we should be able to catch regressions.

Given this would need to run in the browser, we'd probably need some tooling around this. I was thinking it'd be cool to run a headless Chrome instance through puppeteer, and use the [nanobench](https://github.com/mafintosh/nano

The change logs or diffs are currently directly stored in JSON files. However, when we support encryption at rest we should instead store it in a shadow structure of the resource we store, meaning another trie besides the document index beneath the RevisionRootPage.