tiedosto sales_event ja sales_row taulujen luontiin
Added product delete functionality.
Added more operators and search by barcode to model.
Fixed deletion of last item in product management.
Cleaned up sql querys.
sales kesken (transaktio)
Merge remote-tracking branch 'topi/master'
Myyntiseuranta kunnossa
Bug fixes.
Delete rfid_reader_dll.pro
Delete rfid_reader_dll.pro.user
myynti kunnossa
Merge remote-tracking branch 'tommi/master'

Conflicts:
	ui/users/user.cpp
	ui/users/user.h
	ui/users/user.ui
Merge remote-tracking branch 'topi/master'
viilailua
ui fiksailua
Merge remote-tracking branch 'pekka/master'

Conflicts:
	rfid/rfid_reader_dll/rfid_reader_dll.pro