Update to the XY Hub Tiers list

Updated as per Jukain's permission with the UU banlist, the Genesect and Lucarionite ban, the LC Swirlix, Gligar, Tangela, and Yanma bans, and correcting a misspelt Yveltal.
Merge pull request #429 from smogon/1696f1bc4b1c5c359f2dc324c1fdbebb

Update to the XY Hub Tiers list