New Xdelta release

Announcing the BETA release of Xdelta version 2. This release builds
on earlier functionality to provide a complete system for managing
delta-compressed storage and network transport. Using the Xdelta
system, you can easily incorporate this functionality into your
application. The system offers improvements over the use of RCS for
back-end delta-compressed storage, common in version control systems,
and also provides primitive support for delta-compressed transport in
a manner similar to CVSup. This release is accompanied by a technical
report describing the system and comparing it with RCS and GNU diff.