Verify the D3Q15 equlibrium against Shyam's PhD thesis.
Fix typo in alpha series.
Add comments in the entropic module.

Enable alpha estimation for all lattices as the alpha asymptotic
expansion is grid-independent.
Use alpha from the previous iteration as a starting point in the Newton-Rhapson iteration.
Fix entropic model templates.
Add more debugging code to the entropic module.
Add entropic LDC 2d example.
Use a smaller velocity for the entropic 2D example.
Add an entropic utility kernel to compute the entropy for all nodes.
Add sample code to compute entropy for every node.