Update to latest system config
* Added flag to store if version was rated (instead of storing as never-rate)
* Prepare refactoring
* Refactored rating library to be non-static
* Added different storage for rated vs. never
* Allow reset of all flags (with or without overwriting a former "newer" answer)
* Enhanced example to allow reset the rating storage
* Rename of the AppRater classes due to better readability
* Keep increasing the counters even after a positive rating dialog click
* Fix typo
* Getter for used max configuration values now public
* Tweaked output and look of demo app
* Corrected first setting of launch date to lead to proper logging output
* Update documentation and include screenshots