Update to ldpath 0.9.5

While working on ookaboo [1] image search I fixed a bug in LDPath [2] that is essential for the example (4) in [1] to work. However this fix will be only fixed with version 0.9.5 that also introduced an small API change in the RDFRepository API.

This change requires the LDPath RDFRepository implementation for Clerezza and the Entityhub to be adapted accordingly.

[1] http://markmail.org/message/atfojqp7vlagxqsi
[2] http://code.google.com/p/ldpath/source/detail?r=4b1ca3887339e09913d3b8844c4df50fda826a08