When querying LOD-a-lot some queries do not return correct results

[wouterbeek]

Example query: there must be statements with FOAF knows, but the following query gives no results: http://lod-a-lot.lod.labs.vu.nl/?subject=&predicate=foaf%3Aknows&object=

This is because of the sheer size of some of the indices of LOD-a-lot. To accommodate this the HDT library was updated to use 64 bit integers (currently in branch https://github.com/rdfhdt/hdt-cpp/tree/long-dict-id). The Node.js/HDT API probably has to be updated to take these large indices into account.

[RubenVerborgh]

Should probably be fixed in https://github.com/RubenVerborgh/HDT-Node then, but this depends on rdfhdt/hdt-cpp#66 and also rdfhdt/hdt-cpp#63.