Correct number of nanoseconds in a day

I had an off by one error in the domain of nanoseconds.  This would
have caused subtle problems in future comparison code.
Run documentation server on a fixed port

This way I can bookmark the server and easily access it.
Implement mjn/1 form

For certain computations, it's convenient to view time as a single,
linear entity.  By converting modified Julian days and nanoseconds
into modified Julian nanoseconds (seconds since the modified Julian
epoch), this becomes possible.
Implement compare_time/3

One can now describe and ascertain the relationship between datetime
values.
Aliases for commonly used H:M:S forms

These three times of day are the ones that I use the most frequently
in my time-related code.  final_moment is especially helpful and
obnoxious to write/generate each time it's needed.