- changed HoursLogged to TimeLogged property in Author class
- moved methods to Author class: Add, GetAuthorsDict, GetAuthors
- implemented new methods in Author class: SetAuthorsTime, SetAuthorTime, SetAuthorsTimeFormat, SetIssueTime, SetIssuesTime
- changed time type back to string from int in every class
- added methods in Issue class: SetIssueTime, SetIssuesTimeSpent, SetIssueFormat
- changed Authors type in Report class from IEnumerable to List<>
- added methods in Report class: SetTotalTime and SetReportTimes
- call methods in Program.cs for testing purposes