Sit and Sector classes added to model
Back-end of adding new sale implemented
Seats prices form v1.0 implemented
Now event is deleted together with all sectors and seats
sales form and sector map added
Events details page updated: seats map& buy button added
Forms restyled
Sale details page added
event delete alg improved: now events are deleted with sales. Some views improvements
contr for seat check form added
base func for ticketchek form processing added
ticketcheck view created and added to check func
checkseat relocated to seats contr.
Seat check form v1.0 implemented
Now saet price is saved inside Sale
Now it is possible to revert new sale before confirmation