Miscellaneous fixes from review:
- Distribute calendar.js and the interactive test
- Make the pointless protection against leap seconds actually work
by starting in the middle of the day so that forward/back always
move a day.
- Use a variable instead of an inline '8' to know where to start
when removing old day actors.
- Remove a stray comment from the test
https://bugzilla.gnome.org/show_bug.cgi?id=596432
afb3b1e718