Use dax to generate the tet grid.
COMP: Fix minor compilation errors
Temporarily use just a single timestep to debug
ENH: Rob's workaround for synching Connectivity
Start adding in infrastructure to probe points with dax.
Initial implementation of the probing algorithm using dax.

This implementation is very naive and doesn't work well at all.
We have to reduce the number of tets we check per cell to get
anywhere near reasonable performance.