Merge branch 'dev'

Add dtb.conf to release as well

v3.6 Merge from branch 'dev'

Merge branch 'dev'

es_systems.cfg: Re-add missing extensions for Saturn

List addon in the game section (EmuELEC#67)

emuelec-addon.sh updated to generate addon.xml file that allows the
addon to be listed in the game section in addition of executable section. 
Fixes EmuELEC#66

Handy: Bump to ec1dfaf

Include patch to make Zaku playable