Added ModelSpecific for stratified Cox
Intermediate work
First stratified Cox test passed
Fix for non-time dependent models
Examining time-ties in Cox regression
Notes on next step
Fixed non-failure ties; need to merge into master
Minor tweaks in preparing for ties
Make Travis happy
Merge rename to cyclops into stratified_cox
Missed some ccd names in merge
Breslow match without ties contributing to risk-set
Before major overhaul
First working Breslow-ties version
Stratified Cox with Breslow ties is now functioning
Clean up before merge
Merge branch 'stratified_cox' of github.com:ohdsi/CCD into stratified_cox
Merge branch 'stratified_cox'