Handling large amount of files changed

[leonard-thieu]

dt-review-tool doesn't handle large amount of files changed well (see DefinitelyTyped/DefinitelyTyped#17159 for an example). It'll only retrieve the first 30 files (the default Github limit). Handling more files is possible through options and paging but introduces another problem with API quotas. I believe dt-review-tool issues 3 requests per file (meaning over 1200 requests for the above PR).

A possible solution would be to use git to retrieve the data needed. I think this should cut it down to only 1 request per PR but introduces some complexity.