Decide-exchange-model

- Actor name change in data view
- Hide error message when input file is None
- Show save dialog directly when input file is None

The https://github.com/foarsitter/decide-analysis project is now merged in the program and a lot of extra results are generated.

- merged: https://github.com/foarsitter/decide-analysis
- better input validation
- input file examples
- and a lot more