Add event/series scheduling

[robbyb67]

Add scheduling of singel events and series events.

Event data should include:

• event name
• series name
• iRacing season
• track
• available cars
• in-sim start date and time
• session start date and time
• race session time offset (including practice/qualifying sessions)

Series data should include:

• Series name

• iRacing season

• available cars

• series start date

• List of session starting times (plus day offsets)

• optional event interval

• race session time offset (including practice/qualifying sessions)

• Page for managing series

  • Optionally create series events when on regular basis

• Page for managing events

• Provide car classes in order to simplify management

• CarClass data should include:

  • Class name
  • List of Cars

[robbyb67]

Done but needs further refinement.