Bukkit/Bukkit — pull request #773 by crast (2013-02-17 04:39:54+00:00)
Title: Add MetadataProvider for on-demand metadata [BUKKIT-3625]

Read full description at https://bukkit.atlassian.net/browse/BUKKIT-3625

* Created provider interface
* Added provider registration to MetadataStore
* Added unit tests for provider usage
* Updated bukkit.Server interface with methods for registering
Player/Entity/World providers
* Updated bukkit.Bukkit with static implementations
* Updated World with way to register Block providers