Lowered number of iterations
Updated training process to use combo of normal + Cascade 2
Updated training and plotting of three particles
Added saving of pre networks in case of early stopping on Cascade
Training working, but doesn't care about two-particle potentials yet
Work to incorporate two-particle energies initiated
Taking two-particle potential into account when training three-particle forces
Made early stopping criteria a bit less strict (gets another try)
Set r12, r13 and r23 arguments to required
Added project to show how to calculate analytic derivatives w/FANN