Zombies, Lua game modes and two new languages

Big week. Here is what landed:

• Zombie mode
• game modes written in Lua 5.4, no Python runtime needed
• bots hunt each other in modes with no objective
• the client in Portuguese (Brazil) and Spanish

One Lua script can be a whole game mode or change any rule. Plugins live in their own repository, and the server hands them HTTP, JSON and a documented API.

Translations are gettext .po files, so one more language takes no code: open one in Poedit and send it our way.