Mark config annotations as binding annotations for guice
Improve Javadocs on the configuration service.
Rename @Config to @DefaultConfig.
Add missing package-info files.
Fixed a few wrong names in ItemTypes.

Due to the reflection method we use in our implementation, we need to make
sure the ItemType names match up with the names stored in item registry.
Add unique IDs to tasks
Added missing ARMOR_STAND EntityType.

* Fixed wrong return values in Enderman.
Fixed wrong return type in Wither.
Fixed derp with Wither javadoc.
Added BiomeTypes.
Merge pull request #271 from SpongePowered/feature/biomes

Added BiomeTypes.
Fix wrong spelling.
Add method to get running time in ticks
Clarify running tick time javadoc
Add World Border API
Capitalize PlayerChangeGameModeEvent