The first milestone

Milestone 1 of ToDoRegister provides core functionality for event management:

• TableView displays all available events from associated Google Calendar.
• Add event function create new event in the Google Calendar with given name, description, date and reminder date.
• Reminder time should be entered in format "DD.MM.JJJJ HH:MM". Input is flexible, e.g. all separation characters like "/" can be used.
• Edit functionality let modify event name, description, date and reminder date.
• Remove event function
• Action "Reload all" loads all events of calendar again. It can be used to get real reminding time. The user can write any time into reminder time date field. Sms notification of Google Calendar supports only slots for minutes, hours, days or weeks. Hence a time entered by user is adjusted to the next valid time slot.