All of the development of the xen-tools software is conducted via a public Git Repository, if you'd like to use the most recent version of the code then please consider installing from there.
You can checkout a copy of the current version of the code by running the following command:
git clone https://gitlab.com/xen-tools/xen-tools.git
Once you have a copy of the project checked out you can keep it up to date by executing "make update".
There's also an usually uptodate copy of that git repository over at github.com and until 1st of June 2015 there's also the old repository at gitorious.org.