I've created another project at sourceforge:
http://lpc-ext.sourceforge.net/
which will define the extension interface used by Hydra and DGD. The
code is in the public domain.
The current version in the repository is 0.4, which matches with r118
of the baseline branch of DGD. Also in the repository is an updated
version of the rgx package.
Regards,
Felix Croes