* Separated Point queries from Intersection queries. Defined query result types for both
* Updated exports
* Update Utils
* Updated frontend after the queries updates
* Allowed the objects field in the IntersectionQueryResult to be null
* Added the concept of queries with a minimalistic implementation. Implemented PointQuerySolver which handles occlusion, projection and unprojection of points
* Added and tested the 'Pick' PointQuery operations which works just like an onclick viewer event
* Small fixes and changes to query and point query.
* Better approach on the occlusion query solving by using our universal scene intersection routine
* Tested and fixed occlusion testing for points
* Added optional custom width and height to NDC<->Screen helper functions
* Integrated queries in the frontend. Projection queries replace projecting by hand, and also added occlusion queries as a demonstration
* Added refactor comment
Alexandru Popovici