Add some method to filter by status and/or path

[ericbf]

Hello! This extension is great, especially for reviewing code.

One issue we’ve found, if there are a lot of renames (refactoring folder names), it gets very hard to see what files are actually modified and not just renamed. When using git diff-index directly I’d use something like --diff-filter=ACMD to filter out files that are only renamed. Is there some way to do this in this extension? What would also be useful in addition to this would be to filter based on path in the repo, something like -- ':(exclude)apps/ignored-app'.

Thanks ahead of time!