Log Message:
Update to soprano 2.5.2

Soprano 2.5.2 is the second maintenance release of the 2.5 series.
* Fixed a crash in the Soprano local socket client which could occur
  when a multi-threaded client tries to reconnect
* Adjusted the default value for the ServerThreads parameter in the
  Virtuoso backend to match the documentation.

Soprano 2.5.1 is the first maintenance release of the 2.5 series. It
features only one change important to the KDE SC: the working directory
of the Virtuoso process is set to the storage directory to avoid random
checkpoint_in_progress files popping up all over the place.

Soprano 2.5.0 - the release to go with KDE SC 4.5.
* New qHash implementation for Statement
* New methods Node::fromN3, Node::fromN3Stream, and stream operator which
  allows to parse nodes from N3 encoding.
* Updated NRL ontology namespace
* New comparison operator for BindingSet
* Ported the DBus service watching to QDBusServiceWatcher
* Highly improved server socket handling in the local and tcp socket server
  implementation.
* Several improvements in the Virtuoso backend plugin.