Update continuation
Update continuation

-Most of the stuff with initializing equilibria and changing resolution
has been moved to Equilibrium class.
-continuation now basically just calls some methods of Equilibria in
a loop, and soon will be moved to within EquilibriaFamily
-perturbations currently don't work, will need to update them for the
new structure as well as the new coordinates/BC

PlasmaControl/DESC,PlasmaControl/DESC