Using copied project code works now.
TODO - rewrite own code, test with different dT.
Fixed and put back my version of the "project" code.
Shortened velocity and density array names.
Comments, variable names, and color updates.
Comments and looping through dimensions in Simulator.
Velocity sources are now added appropriately.
Grid is now able to support 3D as well as 2D.
Simulator is more dim-agnostic now, too.
All z-indices are defaulted to [1] (needs tweaking for real 3D).