Remove Optional from FormattingCode, it is always present
Rename Message to Text and fix some missing usages of Text
Rename Text.Raw to Text.Plain to make it more clear
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
Remove most static methods and unify 'valueOf'/'values' functions on GameRegistry
add method to check if a plugin/mod with a specific ID is loaded, fixed build.gradle spelling error
Refactor Scheduler to use Objects instead of PluginContainers, leaving implementation to figure out which is which.
Merge branch 'master' into feature/text
Remove type parameter of Text
Improve Text Javadocs
Rename Text to Message, add some Javadocs