The name to be used as the top-level of the app's write directory tree. Should be the name of your group or company.
The name of the application. Will be a subdirectory under 'organization' if organization is null, or the app's top-level write directory.
DefileException if the call fails.
Creates the application write directory.
This function only ensures the write directory is created. It does not add it to the search path. Until this function is called, the Defile.writeDir property is invalid.