Disable media section for 1.0.4.
Disable bios preferences for 1.0.4.
Update INAppStoreWindow.
Set default core for GB/GBC
Fix 'missing core' download behavior to respect default cores
Disable 'Game Scanner' step from Setup Assistant
Fix 3DO system plugin to check both possible locations for disc identifier
Update 4DO submodule ref
Update VirtualJaguar submodule ref
Force upgrade cores on update to 1.0.4

In the future we'll just always do this automatically
Remove xBR shaders

Seeing horizontal artifacts and we don't need this many default filters anyway
Add Atari 2600 controller artwork.
Add Atari 2600 to standard build and Stella to build all scheme
Fix #1629
Set version 1.0.4
Fix #1636 setting dataCell and themeKey in code.
This happened because xibs for other languages than english have lost track of the sidebar data cell somehow.
(Maybe happened during merge)
Added full German translation
Merge pull request #1645 from J-rg/master

Added full German translation
Fixed a few typos
Merge pull request #1649 from J-rg/master

Fixed a few typos