Minor formatting fixes in square_cylinder_2d.py.
Output padding and axes info in the voxelizer.
Use number of actual fluid nodes to calculate MLUPS.
Add string representation of DynamicValue.
Always mask nonfluid nodes.
Export the incompressible variable.
Add a reference for the incompressible model.
Fix reference for the incompressible model.
Rename code_common to mako_utils.
Merge utils.mako into mako_utils.mako.
Add a description in mako_utils.mako.
util_kernels -> kernel_utils
Move core model templates into a subdirectory under templates/
Add a README for the templates directory.