Fix capitalisation of JavaScript in README.
Add .NET excludes to .gitignore
Add skeletons for classes.
Update .gitignore for Visual Studio files.
Add method skeletons to Svy21.
Rename ToSvy21 to ToSvy21Coordinate.
Add method skeletons to Svy21Coordinate.
Add unit test file.
Add equality methods to LatLongCoordinate and Svy21Coordinate.
Add header comment to Svy21.
Add tests.
Copy constants from Java SVY21 file.
Implement CalculateMeridianDistance.
Rename methods and add explaining comments.
Implement CalculateRadiusOfCurvatureOfMeridian.
Implement CalculateRadiusOfCurvatureInPrimeVertical.
Implement ComputeLatitudeLongitude.
Implement ComputeLatitudeLongitude (coordinate input).
Remove unused usings.
Fix improperly-copied test.