Add SLF4J and Log4J logging support

[lukacupic]

PR for #6

[charlesmike]

@lukacupic thank you for your Pull Request. I'll assign someone to review it soon.

[charlesmike]

@amihaiemil I couldn't find any assignee for this task. This is either because there are no contributors with role REV available or because the project does not have enough funds.

Please, make sure there is at least one available contributor with the required role and the project can afford to pay them.

[amihaiemil]

@lukacupic Looks good. Just one remark: always add a description to your PR and reference the ticket you are solving. This is a small PR so I just referenced the ticket.

[amihaiemil]

@rultor merge it please

[rultor]

@rultor merge it please

@amihaiemil OK, I'll try to merge now. You can check the progress of the merge here

[rultor]

@rultor merge it please

@amihaiemil Done! FYI, the full log is here (took me 2min)

[lukacupic]

@lukacupic Looks good. Just one remark: always add a description to your PR and reference the ticket you are solving. This is a small PR so I just referenced the ticket.

Understood, makes sense.