Line wrap
Cleanup Jacobi test
Add function to build differentiation matrix
Add Kronecker product macros
Move x, y, z into fields for DG quad subdomains
Add differentiation matrix to DG quad subdomains
Add geometric factors to DG quad subdomain
Add long real hypot
Build face geometric terms for DG quad subdomains
Add face fields to subdomain
Add face fields to DG quad subdomains
Store normals and surface Jacobian in DG quad subs
Add test for geometric factors