GetESS                  Determines Prior ESS for fixed values of
                        sigma_alpha^2 and sigmabeta^2
GetPriorMeans           Calibrates prior means for Dose Finding Trial
GetSubTite              Gives the subgroup specific optimal dose
                        vector.  Returns a list containing the optimal
                        doses to enroll each subgroup at and the
                        subgroups that should have their accrual
                        suspended temporarily.
SimTrial                Simulates a Sub-TITE trial design
