This class implements platform specific progress metering within ODA IFC.

This class receives progress notifications during various database operations such as loading and saving a .ifc file. 

Working with an instance of the class should include the following steps:

1. Call the setLimit() method for setting the maximum progress value.
2. Call the start() method to begin progress metering.
3. Call the meterProgress() method each time you need to change the current progress value.
4. Call the stop() method to stop progress metering.