rpi: Do MPEG-4 part 2 and h263 in VideoCore
upgrade: Make it possible to upgrade from 'master' a.k.a Bleeding Egde
Empty to trig rebuild because it was broken
rpi: Rework seeking code to be more stable (hopefully)
Fix problem making subtitle scanner crash if it found a file without file ending

Fixes #1716
fontstash: Fix broken browsing

Right pane in UI did not update correctly because URL was not
set in fontstash model
Make subtitle font setting actually work
linux: Fix broken webpopup
rpi: Avoid crash when video ends

Fixes #1759
Add missing file
Merge remote-tracking branch 'upstream/master'