Encoding for the POD text (which includes degrees and fglock's first name). Add a precision about arctic computations.
Proper validation of new height and old altitude parameters.
Reinstating the "altitude" parameter keyword, since it is acceptable in English-speaking astronomical context.
Adding a new test script, with a better data coverage: more than one date, more than one altitude, choice between upper_limb or not.
Add the reference to the RT ticket. By the way, thank you Michael from Memorial University Canada.
Fix an off-by-one error in the computation of days since 0th January 2000.

Why did this error go unnoticed? Because the test file up to version 0.0501
only tested the 21th June and at this time, the sunrise and the sunset
do not vary by much. So, computing the sunrise for 20th June and
comparing with the real value for 21st June would give very similar
results. But with dates far from the solstices, the sunrise and sunset
variation is much greater. So, even with a fudge value of 3 minutes,
the errors were noticeable.
Add a new parameter "upper_limb" and now the 04basic.t test succeeds. At the same time, 01basic.t and 02March21.t now fail!
Fix the tests with correct values.

01basic.t generated from a utility program in Astro-Sunrise github repository.
02March21.t introduce the fudge factor by hand.