The subversion repository is located here.
Obviously, you will need to download a subversion client to access the repository.
This repository is known to work with all standard subversion clients, including subclipse (the eclipse IDE plugin).
svn co http://svn.devloop.org.uk/metastores/
From within the source tree:
svn update
For more information, please refer to the subversion FAQ and documentation.
Follow the build documentation on how to build binary packages from source.