Internet Communications Engine

This version features a garbage collector for Ice for C++
that automatically resolves cyclic object dependencies in
class instances, and a new database migration tool that
provides much greater control over the migration process
than the old XML schema based approach. Freeze now
uses transactions for all write operations, a Freeze
background thread periodically saves created, modified
and destroyed objects, and a new Freeze evictor index
class provides easy-to-use and efficient secondary-key
querying. Marshaling performance has been
improved, and there are numerous minor improvements
and bugfixes.