Soprano 2.2.4 released

[Sebastian Trüg]

Soprano 2.2.4 is a bugfix release (probably the last one before the 2.3 
release) which fixes a few issues:

* Fixed plugins to build as MODULEs instead of SHARED (makes proper "plugins"
  on non-ELF systems)
* Always return an invalid iterator if IndexFilterModel::executeQuery failed.
  This will prevent a deadlock in Nepomuk where the iterator would never be
  unregistered.
* Fixed a bug in the CLuceneIndex which would fail to save an indexed resource
  object if it was the first to be added (using setForceIndexPredicates). This
  fixes query problems in Nepomuk.

Get the sources now from http://soprano.sf.net

Sebastian Trueg