Anim2D 0.18.1

Fixes for the Mac app, and a website. 0.18.0 can't update itself on a Mac: download this version from the release
page.

Added

• A website, turtlegameworks.github.io/Anim2D: downloads for this
  computer from the latest release, and every guide as a web page. Help → Documentation (F1) opens the guides;
  About has Website and Documentation buttons.

Fixed

• Preferences and About Anim2D closed with an error (KeyError: 'mac') on the Mac app.
• Check for Updates failed on macOS with CERTIFICATE_VERIFY_FAILED: the app had no certificates to check
  GitHub's against. Update checks now use the certificates the system trusts (the Keychain on macOS).
• The editor guide's Setup mode screenshot was missing.

Downloads

For	File
Windows: installer	Anim2D-Setup-0.18.1.exe
Windows: portable, no install	Anim2D-Portable-0.18.1.exe
macOS: Apple silicon (M1 and later)	Anim2D-0.18.1-macOS-AppleSilicon.dmg
macOS: Intel	Anim2D-0.18.1-macOS-Intel.dmg

macOS: open the disk image and drag Anim2D into Applications (macOS 14 or later). The builds are not code-signed yet: the first time, macOS says it can't check Anim2D; choose Done, then System Settings → Privacy & Security → Open Anyway. On Windows, SmartScreen: More info → Run anyway. SHA256SUMS.txt has every file's checksum (sha256sum -c SHA256SUMS.txt).

All changes