Add player list header / footer API.
Add Title API.
Merge branches 'master' and 'master' of https://github.com/SpigotMC/BungeeCord into newtab

Conflicts:
	api/src/main/java/net/md_5/bungee/api/connection/ProxiedPlayer.java
	proxy/src/main/java/net/md_5/bungee/UserConnection.java