Plus42 Equations, Preview Release

[Thomas Okken]

New update, Linux only: I changed the display drawing code, so it draws individual pixels as tiny rectangles. This gets rid of the blurriness at non-integral display scales. Note that this is how the iOS and MacOS versions have handled display drawing since forever.

(Unfortunately, the draw-each-pixel-separately trick did not work in the Windows version when I tried it just now; apparently, GDI+ is not as smart at drawing rectangles with non-integer coordinates as the iOS, MacOS, and Cairo renderers. Still looking for a way to get non-integral scaling to look nice in Windows...)