New rewriting, new tests, advances in KartoGraphI,

• The original asserted metadata is no longer stored in the index, due to internal compatibility problems and problems with the virtuoso endpoint
• The dataset, endpoint, metadata, graph lists, class and property partitions resources are now generated from the MD5 hash of their endpoint URL.
• Multiple bugs and fixes, notably, the unfindable description from WASABI is now found
• Large extension of the KartoGraphI website