Added a blank 'server.ip' key to the default glowstone.yml.
Call PlayerMoveEvent.

Based partially on the code of @JeromSar. The event is called more often
than CraftBukkit due to the lack of movement buffering.
Added huge mushroom and more tree generation.

Includes a better generic tree system based on oak, small jungle, and
cocoa trees, as well as birch, tall birch, and spruce tree generation.
Now fires StructureGrowEvent during tree generation.
Added script that fetches Glowkit PRs for Travis.

For PRs, the PR body will be looked up and scanned for links to Glowkit
PRS, which will then be included in the build. Also reorganizes the Travis
script slightly.
Fixed PlayerMoveEvent handling and teleportation offset.

When PlayerMoveEvent's destination is changed, it should be considered a
teleport and fire the appropriate event and handle world changes.

PositionRotationMessage now refers to the client's feet instead of eyes.
Add IBlockGrowable interface
Add ItemDye
Add BlockCocoa
Add BlockPlant
Add BlockCrops
Add BlockDoublePlant
Add BlockGrass
Add BlockMushroom
Add BlockSapling
Add BlockStem, remove BlockMelonStem and BlockPumpkinStem
Modify BlockTallGrass
Make random a protected static field of BlockType
Remove BlockPlant as it's not required here
Fix equality checks