Support for getting changed files in a commit.
Support for getting changed files in a commit.

bwu-dart-contributing/github.dart,kasperpeulen/github.dart,kasperpeulen/github.dart,marcojakob/github.dart,kasperpeulen/github.dart,bwu-dart-contributing/github.dart,kasperpeulen/github.dart,marcojakob/github.dart,marcojakob/github.dart,bwu-dart-contributing/github.dart,bwu-dart-contributing/github.dart,marcojakob/github.dart