[Development] QMovie no longer supports .mng

[Maurice Kalinowski]

> > As a distribution packager, I think that's a good plan. :-) The people 
> > on proprietary operating systems seem less happy about that, as 
> > evidenced by this thread. But that's not MY problem… ;-)
>
> Indeed.
>
> If we want the binaries to include the builds, we could include the DLLs for those libraries too.

For all supported windows platforms? While we shrank the amount of Qt pre-built packages, there is still a larger amount of platforms/configurations we support and ask users to build from source. Stripping that away might be complicated.

Maurice