naptation bug

[litchnom]

With a generic naptation schedule, the entire day is perceived to be a single arc, despite many sleeps upon the arcs should be based on.

python polytime.py --sleeps Alpha 05:30-07:00 Beta 12:00-12:20 Gamma 16:00-16:20 Delta 22:00-01:00 works fine

python polytime.py --sleeps Alpha 00:00-00:20 Beta 02:00-02:20 Gamma 04:00-04:20 does not work as it should.

[litchnom]

A suggestion by @absentabyss is to test for all arcs that don't have sleeps through the midnight to determine if the current arc does. This is an alternative to my current approach of handling arcs which pass through midnight, which should make the code less complicated, making the bug easier to understand, if not resolve the issue completely.