Remove AbstractODRule and AbstractTDRule types in favor of functions

[MartinuzziFrancesco]

the need for the one dimensional and two dimensional types is to dispatch over the CellularAutomaton function, but it's restricting in creating new CAs, since they need to be built through a struct and the type. The rule only takes in the array of initial conditions anyway.

It is possible to change the evolution container to always be 3 dimensional and resize it at the end with a check is one of its dims is 1.