Fix #25
Fix #25

Seth Ladd pointed out that excluding the gh-pages branch is not necessary.

:+1:
bwu-dart-contributing/github.dart,marcojakob/github.dart,kasperpeulen/github.dart,bwu-dart-contributing/github.dart,marcojakob/github.dart,kasperpeulen/github.dart,bwu-dart-contributing/github.dart,bwu-dart-contributing/github.dart,marcojakob/github.dart,kasperpeulen/github.dart,kasperpeulen/github.dart,marcojakob/github.dart