I had to modify norm.py to handle some oddities in the input data.
The error threshold (26 minutes) is still surprisingly large.
I want to investigate more before porting to the other 3 languages.
Does not pass unit test yet.
I had to rework norm.py because I misunderstood the data format.
The date given is not for the beginning of the transit, but
for the peak. This means the normalized data files need to
keep the start time, peak date/time, and finish time.
The unit test needs to adjust start time and finish time
to make sense with respect to the peak time, by adding/subtracting
a day as needed.
Wrote stub C functions for finding transits.
Updated html files containing Espenak test data for Mercury, Venus.
Updated norm.py to convert the html files to easy-to-use text files.
I found that lunar eclipse data is available for many centuries.
I downloaded the data for the years 1701..2200.
Wrote norm.py to extract and convert the parts I care about
into a format that will be much easier to parse in the unit
tests for all four languages.
Regenerate the normalized data from the 'run' script.
This way, I have documentation for where the data came from.
