fix(welcome page): amend link to getting started guides

related to #CAM-2490
remove "public" modifier for interface method
Merge pull request #113 from jangalinski/patch-1

remove "public" modifier for interface method
chore(engine): extract cmmn test helper methods
feat(engine): add HistoricCaseInstance to history

related to #CAM-2839
fix(sql): fix type in postgresql HistoricCaseInstance scripts

related to #CAM-2839
chore(engine): ensure that no empty string is test with LIKE on oracle

related to #CAM-2839
fix(engine): remove JodaTime from test cause of old wls version

related to #CAM-2839
fix(sql): fix typo in mssql HistoricCaseInstance scripts

related to #CAM-2839
fix(engine): revert duration test cause mysql misses milliseconds

related to #CAM-2839
chore(engine): check if already queryed by historic case instance state

related to #CAM-2839