I just installed Rabbitvcs on ubuntu 13.04 as per the official instructions.
When i tried to install apt-get install rabbitvcs-nautilus3, i got the following error message :

Reading package lists... Done

Building dependency tree       

Reading state information... Done

Package rabbitvcs-nautilus3 is not available, but is referred to by another package.

This may mean that the package is missing, has been obsoleted, or

is only available from another source

However the following packages replace it:

rabbitvcs-nautilus



E: Package 'rabbitvcs-nautilus3' has no installation candidate

So i installed it with apt-get install rabbitvcs-nautilus, and now rabbitvcs options are not showing when i right click on a folder. Any help and suggestions will be highly appreciable. Thanks.