Create a separate repository for the equation layout library

[keyboardDrummer]

1. Create a separate repository for the equation layout library
2. Upgrade the library by allowing the equations to be separated into equation sets, that can depend on other sets, but where the set dependencies form a DAG, so the end result is solvable. The equation set mechanism allows arbitrary function to operate on the results of one equation set before being fed into another equation set. This allows us to use max as we need for a table layout.
3. Deduce minimal equation sets from a big set of equations, by doing a bottom-up search for solvable sets.