Update GuildGreet.lua

greets guildmates from the same realm, if they come online
Merge pull request #3 from Luzisto/patch-1

greets guildmates from the same realm, if they come online
Layout adjustment for character name with realm
Merge pull request #4 from Luzisto/Layout-adjustment-for-character-name-with-realm

Layout adjustment for character name with realm
fix command "/gg <name>"
Merge pull request #5 from Luzisto/fix-command

fix command "/gg <name>"
Merge pull request #1 from gOOvER/master

Update