consumption path

[saharnazb]

I cannot see where consumption path is defined. Am I missing it or should we add that to TPI?
@miltonash can you please add this too? I think it is a similar for loop like the one you did for b_mat or you can use hh.get_C in the same loop

[jdebacker]

@saharnazb The problem set only asked that you plot individual consumption profiles for the SS. No need to look at these over the transition path - unless you want to. But maybe ignore that until after you've done all that is required.