updated request portfolio in cep18 to include both constraint types
fixed numeral typo
revised cep18 to address many of @scopatz's comments, namely consistent terminology w.r.t. proposals and bids, clarficiation of the request constraitns, and a proposed solution to the unknowns.
updated cep18 to further address @scopatz's comments
updated cep18 with datastructure implementation
Started draft for CEP 19
Update to CEP19
Update to CEP19
Update to CEP19
Update to CEP19
Update to CEP19
fixed merge conflict