Implement API changes in GlowServer.

* maxPlayers is now mutable
* getMinecraftVersion
* getOfflinePlayerIfCached
* getRecipe(key) and removeRecipe(key)
* createVanillaChunkData: partially implemented
* New tick settings for ambient, water ambient, water mobs
* Tick metrics at the server-level are incompatible with Glowstone
* isStopping
* getMobGoals marked as not implemented
* getMaxWorldSize with config entry
* Make all types of Signs valid fuel
4 files changed