Finally we have a first version of Query API.

We have finished an internal query rappresentation that provide a way to convert different RDF query language into a common Soprano::Query rappresentation.
This is very powerfull because we can Convert a SPARQL query to an equivalent RDQL and vice versa.

May ways are now open...fulltext search, query optimization, custom triplestore...etc.

Memory management isn't completed but for now we have happy enough.