Promoting Additional Releases of OpenToonz

[q2dg]

See opentoonz/opentoonz#1444 for reference

[RodneyBaker]

Unofficial releases to promote include:

Morevna (Linux, Mac and PC)
Morevna (32bit Windows)
OTX (Windows, Mac and Linux portables)
Flat Pak (wide variety of platforms - Linux based)
Snap (Linux)

Also:
OpenToonz github AppVeyor (Windows) Not officially supported but a byproduct of official builds - especially useful for testing (I will make a separate request for addition of a link to the nightly releases via the website as they are officially supported but not generally considered 'stable releases')

[RodneyBaker]

Perhaps the most likely place to add mention of the unofficially supported release of Opentoonz would be a section in the official Opentoonz online documentation:

The section would likely be:
https://opentoonz.readthedocs.io/en/latest/unofficial_releases.html

Recommendation: Any release that cannot maintain a dedicated link to their release should NOT be listed.