Use BlockDisplays for glowing blocks (when possible)

[TheDeafCreeper]

Not all items work in BlockDisplays unfortunately, namely banners (maybe you could do some magic with ItemDisplays?), but it would allow much more flexibility for the shape of the glowing entity if a BlockDisplay was used.

[SkytAsul]

That's right! But then what is the point of using GlowingBlock? The spigot API must be more straightforward, no? EDIT: might be useful to add different colors for each player.