Implement GeoSPARQL in SIS

Following Andy Seaborne's post here: http://s.apache.org/wh

I am going to undertake an effort to implement GeoSPARQL in Apache SIS. I think this will give us an awesome use case and is something that we need an ALv2 licensed library to do.

See the GeoSPARQL implmentation here: http://www.w3.org/2011/02/GeoSPARQL.pdf