Canonical Poisson Bracket Equilibrium

[johnson452]

Adds the capability to have equilibrium initial projection for Canonical-PB. This is used for both initial conditions and BGK operations.

Added:

1. det_h function needed in the input script for normalizing f_lte. This is initially projected on basis in vm_species.c and used in proj_lte
2. New Kernels have been generated to computed the canonical-pb pressure moment using the existing M2ij moment calculator. This is needed because the temperature moment: JvdT = int( h^{ij}(w_i - u_i)*(w_j - u_j)fdw), depends on the inverse metric tensor.
3. Added a new unit test which verifies the moments are projected correctly on a curved surface via the canonical-pb framework. (unit/ctest_canonical_pb_equilibrium.c)

Notes:
a. For canonical-pb, the lte-moments are assumed to be [Jvn, u_i, T]. Places in the code that need n, like projecting f_lte requires det_h to isolate n.
b. Works for GPU.
c. Math-scratch notes available here: Canonical_Poisson_Bracket-3.pdf