Moved test MeshRefinementTests TraceTermProjection from DPGTests to runTests.
Added OP_TIMES_NORMAL_T operator type to enumeration.
Various refactorings, etc. in CamelliaCellTools.
Fixed handling of Node x Line_2 ^ n type topologies in CubatureFactory.
Added isDefinedOnTemporalInterface member to Var.  Made various methods const.
Added sideIsSpatial method to CellTopology.
Added string for OP_TIMES_NORMAL_T.
Fixed handling of 0-dimensional spatial topology in TensorBasis.
Added space-time awareness in various forms to BasisCache.  Not yet completed, though.
Various new BasisCacheTests.  We do have one failure, in computing side normals on space-time topologies.
Merge branch 'master' of https://github.com/CamelliaDPG/Camellia