In honour of the fact that I got oprofile working on my laptop, I have
two small optimisations to constrained-breaking that give an overall
speedup of 10-15% on longish scores. First of all, I cache ragged-right
and ragged-last instead of looking them up every time in
combine_demerits. Secondly, I reversed the order of the loop in
calc_cubproblem.
I also removed break-algorithm.cc and changed the Constrained_breaking
interface slightly -- it now takes the Paper_score in the constructor.
make web works with no alterations.