Merge pull request #54 from lokulin/Indev

Added /list command
/list command improvements

Coding style, Guid, interface, Fallback Command
Add /list support in Protocol17

Fake UUID using md5(username) since protocol17 does not have UUID in
player list item packet
Add /list support in Protocol16

Removed fallback to server /list command
Add Minecraft 1.8.1 in supported version list

Allows support for version=1.8.1 in config file
Fix server version detection for Bungeecord 1.8