Modifying dg update to correctly match rk3 w/ splitting
Temporarily reverting to old version of update (stages separated from each other)
Forgot ppmwrap
Revert 5ef8d90..1e34ab1

This rolls back to commit 5ef8d907a8192a6eb2d3273621f802327f53e143.
Added uniform field with deformation flow test
Revert 1e34ab1..843ec43

This rolls back to commit 1e34ab1eac992c469a647a66e59dc080ef83b692.
Reverting to older RK3 formulation, cross-implementing projection/evaluation algorithms