[ticket/35] Fix language entries in acp

Also sneak in a new (tiny) feature ;D
Merge pull request #36 from dcz/ticket/35

[ticket/35] Fix language entries in acp
[ticket/37] Implement sync_url

Add this in acp, which implies to add a mode which implies to add a
migration file which implies to activate version check and puch version
:O
[ticket/37] one elseif slept through ...
Merge pull request #38 from dcz/ticket/37

[ticket/37] Implement sync_url