ACL usernames support!

IMPORTATANT NOTE: Project has switched to Gradle as build toolchain as result there is change in instruction how to implement a plugin check readme for more info

What's Changed

• update to gradle by @ham1255 in #66
• Javadocs links update by @ham1255 in #67
• add ability to use redisbungee with acl username by @ham1255 in #69
• 9050264