Edited constructor
fixes to calendar
comparepanel final update before review
Added a lot of features. Added customer class, added Register customer, Select Customer, Renamed some methods in DBConnect, rewrote the old queries, now we have better security and readability.
Merge branch 'Auto_Detail' of https://github.com/dinkelstefan/Project-Qars-Windesheim into Auto_Detail
few changes to labels (order of view/available data)
fixes of list from the database (reordering)
Small Bugfixes
Merge branch 'Auto_Detail' of https://github.com/dinkelstefan/Project-Qars-Windesheim into Auto_Detail

Conflicts:
	Qars/Qars/RentCarPanel.cs
Merge branch 'Auto_Detail'

Conflicts:
	Qars/Qars/CarDetailPanel.cs
	Qars/Qars/RentCarPanel.cs
	Qars/Qars/TileListPanel.cs
	Qars/Qars/VisualDemo.cs