v0.4

Add a better clock!

• Universe time is shown as an Earth date (Earth YYYY-MM-DD hh:mm:ss) and in the home and current bodies' own calendars (Droo YYYY-DD hh:mm:ss).
• Click the row to show elapsed time since craft launch (T+DDD:hh:mm:ss) or since switching to the current craft (S+DDD:hh:mm:ss).
• Universe dates can start at either 1 or 0; elapsed clocks always start at 000:00:00:00.
• Each body uses its own solar day. Its year is one orbit around the sun; moons keep their parent planet's year.
• An optional second Earth universe clock uses the loaded system's physical Earth when its day, year, or initial rotation differs from real Earth; T+ and S+ add that clock only when its day length differs.