we have enabled Gerrit for the NatTable project. This will help us on performing code reviews and hopefully will increase the number of contributions.
Note that you need to update the URL (at least the push URL) in order to contribute.
For NatTable this URL now looks like this:
In order to contribute you also need an Eclipse user account and a signed CLA.
For further information on Gerrit and the necessary setup, have a look at the following references: