Added BasisFactory::getNodalBasisForCellTopology(CellTopoPtr cellTopo).
Fixed values of PointBasisDef (wasn't filling in the whole container for containers that were larger than 1 entry).
Added some logic to try to interpret values as a space-time gradient if OPERATOR_GRAD is specified, and to emit errors in that case (since we still need to do more work to implement it).
Fixed initializeNodes() to deal appropriately with a shards Node as the shards topology.
Revised CamelliaCellTools::mapToPhysicalFrame().  Not yet working for tensor topologies.
Added BasisFactoryTests.
Reduced the value of k in the MeshSliceTimeZero test to the minimal k that fails (3).
Added test RefCellPointsForTensorTopology.