adding generics to avoid casting the getRawLogs()

[ahus1]

I've seen your comment "Avoid the ugly cast in getRawLogs" in the readme. This is a try to avoid this cast using generics.

Let me know what you think. If you think is not useful or the wrong direction, feel free to close the PR.

[haasted]

Thank you very much for your contribution! I'm very excited to receive a PR for this issue.

I hope to find time to look at it in the weekend.