Issue #117: Added RepoCommits

Pull request for issue #117. I got qulice's error:
```
"[ERROR] /src/main/java/com/jcabi/github/RtRepo.java[48]: Class Fan-Out Complexity is 31 (max allowed is 30). (ClassFanOutComplexityCheck)"
```
I added ```@checkstyle```, should I fix this?