First step
Merge remote-tracking branch 'upstream/master'
Merge branch 'master' of https://github.com/UNN-VMK-Software/agile-course-practice

Conflicts:
	code/settings.gradle
First classes, test, method
Fixing issue with pull request
Done class which calculate job and cash days
Done class which calculate job and cash days#2
Done class CalculateSalary, fix some bugs in CalculateJobDays and add test at both methods
Delete duplicated files
fixing names in methods and variables
fix gradle settings
First classes, test, method
Rebase and fix files
delete extra files
add new method in CalculateSalary and fix issue from Diana
Added layout of View.
Many refactoring and change practice in classes
Added ViewModel layer.
Added binding to View.
Added binding for range names in View.