0.4 stable branch for Elisa Music Player

[Matthieu Gallien]

Hello,

I have just created the 0.4 branch to stabilize the next release of Elisa.

I have updated repo-metadata to track stable branch 0.4.

We plan to tag the final release on 19th May 2019 with a string freeze 
starting on 28th of April.

Is it OK for i18n teams ?

Thanks for your very important work on the translations.

Best regards
--
Matthieu Gallien