Add Item/ItemBlock

Signed-off-by: Chris Sanders <zidane@outlook.com>
Correct my faiure to follow conventions

Signed-off-by: Chris Sanders <zidane@outlook.com>
Added Licence to Item and ItemBlock
Merge pull request #14 from lclc98/master

Added licence to Item and ItemBlock
Merge branch 'master' of git://github.com/SpongePowered/SpongeAPI into chat

Conflicts:
	src/main/java/org/spongepowered/api/Game.java