added services project
missing file
added holiday request service
added data project
added interface for domain repositories
added interface for holiday request repository
added data context and database factory interface
added holiday request repository
added constructor injection of holiday request repository to holiday request service
added save method to holiday request service
added unit of work interface
implemented unit of work for module
saving new holiday request to data storage
added holiday request entry repository and interface
moved IHolidayRequestService to better location
added creating and saving holiday journa entry when creating new request
added databasefactory class
added disposable base class
took care of data context disposing stuff