Fix i18n of the gschema file
Updated Basque language
Updated Slovenian translation
Updated Slovenian translation
Prepare 3.12.1
Updated Indonesian translation
3.12.2
Updated German translation
help: Remove old docbook help

Also remove obsolete docbook help's translation
help: Add legal.xml
help: Add index page
help: update description for index page
help: add help/Makefile.am
help: add logo32.png, logo.png
help: add logo in Makefile.am
help: add start-game page
help: add start-game.page in help/Makefile.am
help: add play-game page
help: add play-game.page to help/Makefile.am
help: add note to use each combination once in play-game.page