added module hr_worked_days_from_timesheet
removed authors.txt file and corrected indentation
corrected import_worked_days function
added translation
Fixed license text
Added comments and docstrings to make the methods more readable.
Added yml test for the worked_days_from_timesheet method
Added yml test for the worked_days_from_timesheet method
Added comments in yml tests
Merge pull request #26 from savoirfairelinux/7.0-ddufresne-worked_days_from-timesheet

added module hr_worked_days_from_timesheet