Update russian strings.xml by @Sevinfolds in https://github.com/eddyizm/tempus/pull/249
Disallow duplicate songs in queue by @eddyizm in https://github.com/eddyizm/tempus/pull/252
Fixed crash when viewing share by @drakeerv in https://github.com/eddyizm/tempus/pull/255
Update Polish translation by @skajmer in https://github.com/eddyizm/tempus/pull/257
Add podcast channel visible when empty podcasts by @eddyizm in https://github.com/eddyizm/tempus/pull/260
