Whu-scorechecker

* Add tests and coverage tests for this project.
* Make the project into a package for further convenience.
* Add support for continous-deployment on Github.
* Fix several bugs.
* Split decryption, encryption, type checks and range checks into util package.
* Move the loader to an upper layer.
* ConfigApp and ResultApp inherit the BaseApp now.

* Add documents and fix lint issues.
* Add a saving configurations feature.
* Fix several bugs.

* The first release after we refreshed this repository.
* Model-based feature.
* More-readable codes and well-organized project structure.
* Enough freedom to create a simple model and make your own queries in a few lines.