Update to version 0.4.0 covers the following changes, extensions and bug fixes:
- There are no different types of routers anymore, the normal Router covers now all functions.
- Matching of processes was moved to the processes class itself, to make a simpler API
- Two new process classes are introduced: Compound Processes and RequiredCapabilityProcesses
- Bug fixes were made considering multiple concurrent breakdown states
- Logging of debug messages is now more easily configurable with prodsys.set_logging()