Added ServiceManager

Service Manager is responsible for opening and closing all services
hosted on the server.
Added flightNumber variable to Flight.cs
added SQL statements

guid generator
Merge remote-tracking branch 'origin/Mainliner'
Merge branch 'master' of https://github.com/Nedlinin/SuperKidsDay
Merge remote-tracking branch 'origin/master' into UIWorkSD
Adding a new family now gives a family id

Also added the ability to delete a person from a family.
Some UI rework.