Removed redundant refraction calculations from Astronomy.Horizon().
Added a unit test that InverseRefractionAngle() converges and calculates
an accurate inverse of RefractionAngle().
More work on new functions for converting orientation systems.
Changed a few classes to structs for memory allocation efficiency.
Moved stuff around in astronomy.cs so the Astronomy class comes
last. This is helpful when I want to add new functions, so I
don't have to search for the end of the class.
Starting to work on rotation functions in C#.
Added class RotationMatrix.
Split precession() into precession() and precession_rot().
Fixed problem in csdown handling type double[3,3].
Currently I ignore any errors when checking the C# documentation,
because there are broken links for the rotation functions I
haven't started adding yet. I will turn that error check back on
once I finish those functions.
I was going to write a Python program to parse the
xml file generated by the C# compiler.
The problem is it does not contain enough information
about types, as explained here:
https://docs.microsoft.com/en-us/dotnet/csharp/programming-guide/xmldoc/how-to-use-the-xml-documentation-features
"The XML file does not provide full information about the type and members
(for example, it does not contain any type information).
To get full information about a type or member, the documentation file
must be used together with reflection on the actual type or member."
So that means I will end up writing the documentation generator in C#
and using reflection along with the XML file to generate Markdown.
pydown.py now searches description text for internal links
and expands them properly for Markdown file README.md.
For example: "#Body" ==> "[`Body`](#Body)".
Fixed a couple of incorrect "Astronomy_..." names in Python docs.
Never use pound-signs inside documentation for Python return types.
Automatically create internal link just like for function parameter types.
Added special case logic in pydown.py for "Time or `None`".
Fixed minor documentation mistakes in JS version.
Separate the calculation of refraction angle from the Horizon function.
Added missing documentation for the parameters of the Horizon function.
Added definition of class Spherical. Not yet used, but soon will be.
Instead of having the same calculations duplicated in both
nutation() and nutation_rot(), I reworked nutation() in terms of
nutation_rot(). Use nutation_rot() to calculate the rotation matrix,
then multiply that matrix by the input vector to produce the output vector.
