Refactor CoxPHModel class to encapsulate conceptual operations in protected methods.
Merge branch 'master' into aboyoun-coxph
Merge branch 'master' into aboyoun-coxph
Merge branch 'master' into aboyoun-coxph
Prepare for newdata argument in survfit.
Merge branch 'master' into aboyoun-coxph
Integrate Cox PH Model into the scoring infrastructure.
Merge branch 'master' into aboyoun-coxph
Merge branch 'master' into aboyoun-coxph
Allow for newdata in the survfit method for CoxPHModel objects.
Merge branch 'master' into aboyoun-coxph