Changed title of the prior work section.
Editorial change for type-(n, m, 1) instances section.
Added comment about how the performance of the polyhedral model is adequate for the "Construyendo Mis Sueños" program.
Changed wording slightly to avoid an overfull hbox in the conclusion chapter.
Changed wording in the future work section, from polyhedral model to ILP model.
Typo fix in facet enumeration appendix.