Merge pull request #8 from unknownloner/master

Fix SpoutcraftBackground being upsidedown
Add netty/junit as dependencies

Thanks @Grinch for the assist
Signed-off-by: Chris Sanders <zidane@outlook.com>
Update README.md

- Deal with a tab that managed to sneak it's way in to the build.gradle
- Fix SpoutcraftBackground only pulling in backgrounds from the "Day"
  folder.

Signed-off-by: Steven Downer <grinch@outlook.com>
Switch to ByteBuf (netty)

Signed-off-by: Chris Sanders <zidane@outlook.com>
Fix AddonListCodec

Signed-off-by: Chris Sanders <zidane@outlook.com>