2019.1.0.7

removed RevitAPIUI, implemented IExternalDBApplication, access Revit application in ApplicationInitialized, load as DBApplication, first successful UI-less execution

2019.1.0.6

all five stairs generated without displaying warnings

2019.1.0.5

cleaned up for publishing

2019.1.0.4

delete all warnings in StairsEditScopeFailuresPreprocessor

2019.1.0.3

cleaned up Command.cs before adding warning swallower

2019.1.0.2

completed and cleaned up readme

2019.1.0.1

compiled and tested successfully with expected Revit warning messages in Revit 2019.1

2019.1.0.0

original source code from Revit 2019.1 SDK sample