Update change log with info about new dev branch for contributers.
Update change log with info about new dev branch for contributers.

UweTrottmann/SeriesGuide,UweTrottmann/SeriesGuide,0359xiaodong/SeriesGuide,epiphany27/SeriesGuide,hoanganhx86/SeriesGuide,artemnikitin/SeriesGuide,r00t-user/SeriesGuide