Modify dates and final dataset variables

03: Change definition of episode dates (replace 03 Datasource
Preparation_20120522 - Chronic HBV with 03 Datasource
Preparation_20120614 - Chronic HBV)
08: Change output variables for main01 (replace 08 Final
Steps_20120511_ChronicHBV with 08 Final Steps_20120523_ChronicHBV)