Twine 2.2.1

Release Date: December 20, 2017

Bugfixes

Last modified dates on stories in the desktop app are maintained correctly.
Publishing stories with colored tags now works correctly.
Publishing stories correctly prefers an HTML version of the story, instead of a ZIP archive (used with iOS only).

Release Date: December 14, 2017

Passages can now be wide, tall, or just plain large.
Tags can be assigned colors, which show up as a vertical stripe on a passage in the story map. Every tag doesn't need to have a color.
You can now press the plus and minus keys to change the zoom level of the story map.
A Turkish localization has been added thanks to H. Utku Maden.
A number of extraneous libraries have been removed, so the overall file size of the app has been decreased, and it should load faster.
The built-in SugarCube story format has been updated to 2.21.0.
The built-in Harlowe story format has been updated to 2.1.0.

When you zoom in and out, Twine does a better job of keeping the window centered where you were looking.
The zoom level you last set for a story is now remembered by Twine.
If for some reason a story format can't be loaded, you can still delete it.
The desktop app is more tolerant of story files that it has trouble importing at startup -- it keeps going, so you at least can get to the story list.
If the desktop app does run into problems on startup, it shows the error message it should; previously, it would show a blank white page.