Refactored to be able to use a list of subjects to use
Added SPARQL query for colleges buildings
Added query for non colleges buildings
Updated files with latest data (buildings)
Get buildings not belonging to colleges AND buildings with no known occupier
Updated SPARQL query, thanks @alexsdutton
Simplified query
Also filter buildings having site in Site from a college or an hall
Added some documentation
Added some documentation on SPARQL query
Fixed SPARQL query
Merge pull request #2 from ox-it/differentiate-colleges-buildings

Differentiate colleges buildings