[koly]Added the salary test
[Koly] Refactor the test
[Koly] Added the test for the bonus
[Koly] Refactored the test for readability
[Koly] Added the bonus tax rate functionality
[Koly] Added the personal tax
[Koly] Refactored the personal tax interface
[Koly] Added the total functionality
[Koly] Refactored the calcualtion of final bonus
[Koly] Refactored the kengdie implementation
[Koly] Implemented the app
[Koly] Refactor
refactored the main method
Merge branch 'master' of https://github.com/kolyjjj/salary_calculator