added excel export functionality
Merge branch 'master' of https://github.com/idoychinov/DB-Teamwork-Team-Manticore

Conflicts:
	Databases-Teamwork-Practical-Project/SantasToyFactory/SantasToyFactory.ConsoleClient/SantasToyFactoryConsoleClient.cs
finalized version. Added step by step wizard to execute all tasks.