Alpha Release 0.1.26

date: 2020-06-02_

• Vector, Point, Rotation, Orientation now satisfy IPFunction directly; only numbers need to be wrapped.
• This means they also now have units, which become required arguments for their construction, so constant(),
  vector(), point(), rotation(), and orientation() now require them.
• Arithmetic requires compatible units.
• The TypeScript typing for units got a bit simpler and a bit more reliable, but still fails on certain key inferences.
• LaTeX generation got a bit more consistent, and the setup git simpler.
• Implement link rewriting for typedoc-generated doc so it can link to non-TSDoc-generated documents.
• Change Piecewise.at to take tuples rather than alternating pairs.
• Fix Piecewise integration bug.
• Update ObservableHQ page for the changes.