ticket:6 patch applyed, unused <label>'s removed, some changes in templates
ticket:6 fixed js troubles
ajax and calendar handlers moved to form template
ticket:9 created test
ticket:9 redundancy in tests is removed
ticket:3 methods and attributes is understanded
ticket:3 additional fields are added to the model, middleware writes to them
ticket:3 created migration, tested
ticket:3 modelForm experiments